One Word

🟢 Lite — Quick Review (1h–1d)

One Word Substitution is a vocabulary topic where a phrase or description of something is replaced by a single word. In SSC CGL Tier-I, 1-2 questions test your ability to identify the correct single word from a description. This topic requires consistent revision because there is no formula — it is pure memorisation and exposure.

High-Yield One Word Substitutions (Alphabetical by Category):

People and Professions:

• A person who pretends to be what he is not: Hypocrite
• A person who hates women: Misogynist
• A person who loves humanity: Philanthropist
• A person who collects coins: Numismatist
• A person who studies the origin of words: Etymologist
• A person who flies an aircraft: Aviator
• A person who writes one’s own biography: Autobiographer
• A person who is indifferent to pleasure and pain: Stoic
• A person who renounces religious faith: Apostate
• A person appointed to act for another: Deputies / Proxy

Places and Buildings:

• A place where clothes are washed: Laundry
• A place where dead bodies are kept: Morgue / Mortuary
• A place where birds are kept: Aviary
• A place where government records are kept: Archive
• A place where monks live: Monastery
• A place for sick people to receive treatment: Hospital

Qualities and Characteristics:

• The quality of being very large: Enormity / Immensity
• The quality of being easily broken: Fragility
• The quality of causing death: Mortality / Lethality
• The quality of being without shelter: Homelessness
• The quality of being very careful: Cautiousness / Prudence
• The quality of being very great in number: Myriad
• The quality of being easily deceived: Credulity

Actions and States:

• To make something worse: Exacerbate / Aggravate
• To remove a person from power: Depose / Dethrone
• To officially cancel a law: Repeal / Abolish
• To return to a former habit: Relapse / Revert
• To spread false news: Monger / Spread canards
• To give a name to a newborn: Christen / Baptise
• To write in a different script: Transcribe / Transliterate

⚡ Exam Tip: One Word Substitution questions in SSC CGL are almost always tested as: “Which one of the following words correctly describes [phrase]?” The phrase is always in the form of a noun phrase. If you don’t know the answer immediately, eliminate options by checking whether the suffix matches the category (e.g., -ity words for qualities, -ist for professions, -ment for states).

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🟡 Standard — Regular Study (2d–2mo)

One Word — SSC CGL Study Guide

Core Concept: One word substitution is a system where phrases describing a person, thing, idea, action, or quality are represented by a single word, usually derived from Latin, Greek, or Old English roots. The key skill is pattern recognition — once you know the common patterns, you can make educated guesses about unfamiliar words.

Worked Examples:

Example 1: “A disease that spreads over a whole country simultaneously” Options: (a) Endemic (b) Epidemic (c) Pandemic (d) Sporadic Answer: (c) Pandemic — pandemic comes from Greek “pan” (all) + “demos” (people); refers to a disease that spreads worldwide. Epidemic is restricted to a region; endemic is constant in a region; sporadic is irregular.

Example 2: “One who believes that the best course of action is to enjoy present pleasures” Options: (a) Ascetic (b) Hedonist (c) Stoic (d) Puritan Answer: (b) Hedonist — from Greek “hedone” (pleasure); a person who believes pleasure is the most important goal.

Example 3: “The study of the origin and history of words” Options: (a) Etymology (b) Lexicography (c) Philology (d) Semantics Answer: (a) Etymology — from Greek “etymon” (true sense) + “logia” (study); the study of word origins.

Example 4: “A disease that is constantly present in a particular region” Options: (a) Epidemic (b) Pandemic (c) Endemic (d) Sporadic Answer: (c) Endemic — from Greek “en” (in) + “demos” (people); native to a specific region or population.

Common Patterns and Suffixes:

Suffix	Category	Example
-ist	Person who does/practises	Artist, Dentist, Typist, Fatalist
-ity / -ty	Quality, state	Reality, Dexterity, Honesty
-ment	State/action/result	Establishment, Development
-tion / -sion	Action/state	Revolution, Conversation
-ance / -ence	Quality/state	Importance, Presence
-ous	Full of (quality)	Dangerous, Curious
-able / -ible	Capable of being	Comfortable, Visible
-phobia	Fear of	Claustrophobia, Xenophobia
-phile	Lover of	Bibliophile, Francophile
-cide	Killing	Insecticide, Homicide
-meter	Measuring device	Thermometer, Barometer

Comparison Table — Commonly Confused One Word Substitutions:

Phrase	Correct Word	Wrong Word Often Chosen
Study of animal behaviour	Ethology	Ecology
Study of insects	Entomology	Pathology
Fear of closed spaces	Claustrophobia	Xenophobia
Fear of heights	Acrophobia	Agoraphobia
Study of earthquakes	Seismology	Geology
Belief in fate	Fatalism	Determinism
A remedy for all diseases	Panacea	Elixir
A thing that is irreplaceable	Irreplaceable	Unique
The art of effective speaking	Rhetoric	Oratory
Speaking without preparation	Extempore	Improvised

Common Student Mistakes:

• Confusing endemic, epidemic, and pandemic — learn the prefixes: en- (in), epi- (upon/among), pan- (all).
• Choosing similar-sounding words without understanding the precise meaning.
• Mixing up “-phobia” (fear) and “-phile” (love) — common in xenophobia/xenophile confusion.
• Inverting entomology (insects) and pathology (disease) — both end in “-ology” but mean different things.
• Confusing “etiology” (cause of disease) with “etymology” (origin of words).

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🔴 Extended — Deep Study (3mo+)

One Word — Comprehensive SSC CGL Notes

Theoretical Foundation: One word substitution is rooted in the English language’s Latin and Greek heritage. Many academic and formal words in English derive from Greek roots (philosophy, science, medicine) and Latin roots (law, government, religion). Understanding these roots dramatically expands your ability to decode unfamiliar words, especially when the exact answer isn’t immediately known.

Greek Root System:

Root	Meaning	Example Word
anthropos	human	Anthropology, Misanthrope
bios	life	Biology, Biography
demos	people	Democracy, Demography
ethos	character	Ethics
genesis	origin	Genesis, Gene
ge	earth	Geography, Geology
graph	writing	Graph, Biography
logos	study	Psychology, Sociology
metron	measure	Thermometer, Chronometer
morph	form	Morphology
pathos	feeling	Sympathy, Empathy
phobos	fear	Claustrophobia
phile	love	Bibliophile
psyche	soul/mind	Psychology
sophos	wise	Philosophy
tele	far	Telescope, Telepathy
thanatos	death	Euthanasia

Latin Root System:

Root	Meaning	Example Word
aqua	water	Aquarium, Aqueduct
audire	to hear	Audience, Auditorium
bios	life (Greek origin)	Biology
capere	to take	Capture, Accept
cedere	to go	Process, Recession
civitas	citizen	Civil, Civilian
corpus	body	Corporation, Corpse
currere	to run	Current, Course
dicere	to say	Dictate, Dictionary
ducere	to lead	Conduct, Produce
facere	to do/make	Factory, Manufacture
ferre	to carry	Transfer,iffer
fides	faith	Confidence
frangere	to break	Fragment, Fracture
genus	race/kind	Genus, Gender
gravare	heavy	Grave, Gravity
habitare	to dwell	Habitat, Inhabit
jacere	to throw	Project, Trajectory
legere	to read/choose	Legend, Lecture
libre	book	Library, Libretto
loqui	to speak	Colloquial, Soliloquy
luna	moon	Lunar, Lunatic
magnus	great	Magnify, Magnitude
malus	bad	Malice, Malformed
mandare	to order	Command, Mandate
manus	hand	Manual, Manuscript
mare	sea	Marine, Maritime
mater	mother	Maternal, Maternity
medicina	medicine	Medicine, Medical
mens	mind	Mental, Commentary
metiri	to measure	Dimension, Commensurate
mittere	to send	Transmit, Dismiss
monstrare	to show	Demonstrate
mors	death	Mortal, Mortuary
movere	to move	Motor, Motive
nasci	to be born	Native, Nature
navis	ship	Navy, Navigate
niger	black	Denigrate
nocere	to harm	Innocent (originally harmless)
nomen	name	Noun, Nominal
novus	new	Novel, Innovation
oculus	eye	Ocular, Binocular
omnis	all	Omniscient, Omnipotent
opus	work	Opera, Opus
oratio	speech	Oration, Oratory
pater	father	Patriarch, Paternity
pati	to suffer	Patient, Pathology
pax	peace	Pacific, Peace
ped	foot	Pedestrian, Pedal
pes	foot	Expedite (push feet forward)
plicare	to fold	Complicate, Imply
porta	gate	Portal, Port
portare	to carry	Export, Import
primus	first	Primary, Prime
quattuor	four	Quadrangle, Quadrilateral
radix	root	Radical, Radish
radius	ray	Radial, Radiation
regere	to rule	Regent, Regulate
rogare	to ask	Interrogate, Prerogative
Roma	Rome	Roman, Romantic
rosa	rose	Rose, Rosary
rus	countryside	Rural, Rustic
salvare	to save	Salute, Salvage
sanctus	holy	Sanctify, Sanction
sanguis	blood	Sanguine, Consanguineous
scribere	to write	Scribble, Script
sedere	to sit	Sedentary, Session
sentire	to feel	Sentiment, Sense
sequi	to follow	Sequence, Consequence
servire	to serve	Serve, Servant, Service
signare	to mark	Signal, Sign
silentium	silence	Silence
sol	sun	Solar, Solstice
solus	alone	Solo, Solitary
solvere	to loosen	Dissolve, Resolve
sonus	sound	Sonic, Resonant
sophia	wisdom	Philosophy
species	appearance	Species, Special
specere	to look	Spectacle, Spectator
sphaera	globe	Sphere, Hemisphere
stare	to stand	Stationary, Status
status	condition	Status
sternere	to spread	Prostrate
stringere	to draw tight	Stringent, Strict
struere	to build	Construct, Structure
studium	study	Study, Studio
suadere	to advise	Persuade
sub	under	Submarine, Substandard
sumere	to take	Assume, Consume
super	above	Super, Supernatural
tangere	to touch	Tangent, Contact
tempus	time	Temporal, Contemporary
tendere	to stretch	Tend, Extend
tenere	to hold	Tenure, Retain
terminus	end	Terminate, Terminal
terra	earth	Terrace, Terrain
testis	witness	Testify, Attest
texere	to weave	Textile, Texture
thesaurus	treasury	Thesaurus
timere	to fear	Timid, Timorous
trahere	to pull	Attract, Extract
tres	three	Triple, Triangle
turbare	to disturb	Disturb, Turmoil
umbra	shadow	Umbrage, Umbrella
unda	wave	Inundate, Redundant
undo	to put in place	Undo
una	one	Unanimous, Unify
urbs	city	Urban, Suburb
usare	to use	Use, Utilise
vacare	to be empty	Vacant, Vacuum
vadere	to go	Evade, Invade
valere	to be strong	Value, Valid
vehere	to carry	Vehicle
verbum	word	Verb, Verbal
versare	to turn	Reverse, Diversify
vertex	top	Vertex, Vertical
verus	true	Verify, Verdict
via	road	Viaduct, Deviate
videre	to see	Video, Visa
vincere	to conquer	Invincible, Victory
virtus	courage	Virtue
vita	life	Vital, Vitamin
vivere	to live	Vivid, Survive
vocabulum	word	Vocabulary
volare	to fly	Volatile, Voluntary
volo	I wish	Volition
volvere	to roll	Revolve, Volume
vorare	to devour	Voracious

SSC CGL PYQ Pattern (2019-2023):

• 2023 Tier-I: 2 one-word substitution questions — “pandemic/endemic” type and “person who” type
• 2022 Tier-I: 2 questions — 1 abstract quality (ending in -ity), 1 person-type (ending in -ist)
• 2021 Tier-I: 1 question — common everyday words
• Tier-II: One word substitution sometimes appears in the vocabulary section of the descriptive test
• Difficulty: Moderate to high; options are designed to be close in meaning or sound similar

⚡ Advanced Exam Tip: When an idiom describes an action involving a tool or object (e.g., “to bite the dust”), the one-word substitution often comes from a Latin or Greek root involving the same concept. For instance, “fear of the sea” is thalassophobia (Greek thalassa = sea), not aquaphobia (which is fear of water). Watch for the Greek/Latin origin matching the context.

⚡ Second Advanced Tip: In the exam, if you’re stuck between two options, look at the suffix. An “-ity” ending word represents a quality or state. An “-ist” ending represents a person. If the question describes a person, eliminate all “-ity” words. If it describes a quality, eliminate all “-ist” words. This cross-filtering technique eliminates 50% of wrong answers in under 5 seconds.

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