Most used 60 GRE words..

Esoteric - understood by a small section of people.
syn- Arcane

Eg: yoga, ayurveda are the ancient esoteric sciences.

Obfuscate - obscure, not clear, confuse

Dilatory - slow to act, delay, Procrastinate

eg: His dilatory driving made everyone to reach office an hour late.

Polemic - a strong verbal attack on someone.

eg: Everyone made a polemic against Brasil on its world cup defeat by Germany.

Cramming - study intensively over a short period of time, completely fill to the point of overflowing.

eg: students crammed for their semester exams.

Epiphany - a moment of sudden realization.

eg: I had a moment of epiphany that I did not close my pants zip.

Alacrity - excessive enthusiasm.

eg: Phil goes to the gym with high alacrity.

Prosaic - dull and unimaginative 

eg: This is another prosaic movie with routine stuff revolving around love.

Veracity - truthful

eg: Politicians are hardly known for their veracity.

Paucity - scarcity, insufficient quantities.

eg: Scientists have a paucity of information about the birth of the universe.

Contrite - feeling remorse (regret) of something doing wrong.

eg: I shouted on my mom, later I became contrite and called her.

Disparate - different in kind.

Eg: biology and history are two disparate ancient sciences.

Egregious - outstandingly bad

eg: Suarez committed a egregious mistake in this world cup biting the other player.

Innocuous - harmless

Eg: Most of the germs are innocuous in nature.

Inoculate - vaccinate, inject.

Eg: Microorganisms are inoculated into the laboratory animals.

Erratic - high's and low's.

Eg: Stock market is notoriously erratic.

Errand - a small chore (job).

Eg: he used to finish his errands before noon.

Arrant - extreme, worst kind.

Eg: an arrant liar, an arrant fool.

Bleak - Bleak weather - cold, piercing, harsh and freezing weather.

            Bleak landscape. - lacking vegetation, barren land

            Bleak room - charmless and inhospitable

            Bleak situation - the situation is not hopeful, encouraging, not positive.

lugubrious - sounding sad, dirge.

eg: His face face looked even more lugubrious than usual.

Profuse - abundant, excessive

Eg: I received profuse appreciation after the dance

Extant - still in existence, not extinct.

Eg: James bond is the extant character created by Ian Flemming 50 years ago.

Sedulous - showing dedication, diligence

Eg: I watched the film film with the most sedulous care.

Meticulous - showing great attention
Eg: They did a meticulous job of restoring the painting.

Conscientious - very careful in doing what you are supposed to do.
Eg: He is a conscientious man, he did his duty perfectly.

Imbibe - intake of knowledge/ideas.
Eg: I imbibed the teachings of Swami Vivekananda.

Benighted - having no knowledge or education, ignorant.
Eg: Many parts of the world are still in the benighted stage.

Inundate - overwhelmed with too many things, flooded, deluge.
Eg: She was inundated with flowers and deluged with calls on her birthday.

Histrionic - excessively dramatic
Eg: She was accustomed to her mother's histrionics.

Demur - to show reluctance

Demure - shy, modest, reserved.
Eg: call a man demure, then they will surely demur.

Perfunctory - when it is routine, you do without enthusiasm, carelessness.

Preemptive - to act before someone else does.

Eg: He was about take his ID, I preemptively took it.

Peremptory - bossy and dominating.
Eg: My sister peremptorily told me to wash the dishes, I did them perfunctorily.

Indigent - poor
Eg: a charity for the need of indigent artists.

Indignant - feeling anger or annoyed due to unfair treatment.
Eg: when we are waiting for a coffee in a queue, if someone cuts in front of us and places an order then we become indignant.

Expurgate - to remove objectionable material, 'beeps' in films.

Expunge - to wipe off.
Eg: I expunged that bad incident from my mind.

Gerrymander - manipulate the boundaries of a city to win in an election.

Pollyannaish - optimistic, and cheerful.
Eg: children are always pollyannaish in nature.

Chauvinist - a person who thinks his sex/nation etc..is great and superior.
       Male chauvinist is the person who thinks males are superior than females

Pyrrhic - won at too great cost,
Eg: A defeat is better than pyrrhic victory since that devastating cost is tantamount(equal) to defeat.

Quotidian - ordinary and regular.
Eg: quotidian traffic.

Kafkaesque - People experience a kafkaesque situation in the government offices in India.

Quixotic - not practical, dreamer, utopian.
Eg: This is a vast and quixotic project.

Maudlin - excessive emotion.
Eg: maudlin films were quite popular in India in 70's.

Panglossian - excessively optimistic even in unrelieved hardship.
Eg: Scolari, Brasil's coach was with a panglossian hope to win the match after giving 7 goals to germany.

Malapropism - mixing up of words with similar sounds.
Eg: It is Malapropism, if you use protein actor, instead of protean.

Aplomb - to be confident.
Eg: he showed great aplomb in passing the psychological test.

Quisling - traitor
Eg: police arrested the quisling manager of the factory.

Byzantine - intricate, complicate
Eg: Europe is filled with many byzantine structures related to 17th century.

Labyrinthine - complicated networks and paths, simply a maze

Galvanize - inspire someone into taking an action.

Eg: The coach galvanized the team during the break seeing their low performance.

Supercilious - behaving as if he is superior, didainful.
Eg: A supercilious old man.

Protean - versatile in nature
Eg: he's a protean actor.

Sartorial - relating to clothes.
Eg: He has a poor sartorial taste.

Mercurial - unpredictable change in mood, capricious, fickle, volatile.
Eg: His fellow students always complained about his mercurial temperament. 

Jaundice - to be biased against as a result of envy and prejudice.
Eg: jealousy has jaundiced his judgement.

Jejune - insipid, dull.
Eg: he had a jejune breakfast.

Lament - express grief.
Eg: he was lamenting the death of his infant daughter.