1. LUGUBRIOUS (ADJECTIVE): sad
Synonyms: mournful, sorrowful
Antonym: joyful, pleasant
The teacher was in lugubrious mood so he dismissed the class early.
2. INDUBITABLE (ADJECTIVE): undoubted
Synonyms: apparent, assured Antonyms: dubious, questionable
It is an indubitable fact we must conserve water during the harsh drought.
3. ACQUIESCE (VERB): agree with some reluctance
Synonyms: conform, comply Antonyms: deny, resist
After a lot of persuasion, he finally acquiesced.
4. ABROGATE (VERB): put an end to
Synonyms: annul, abolish Antonyms: validate, permit
No one can abrogate your freedom of speech.
5. DITHER (NOUN): A state of indecisive agitation
Synonyms: distress, confusion Antonyms: calm, peace
I am in such a dither I forget to put the water in.
6. EBULLIENT (ADJECTIVE): extremely lively, enthusiastic
Synonyms: exuberant, buoyant Antonyms: depressed, unhappy
The Prime Minister was a fiery, ebullient, quick-witted man.
7. MERETRICIOUS (ADJECTIVE): based on pretense; deceptively pleasing
Synonyms: gaudy, flashy Antonyms: genuine, real
He was thinking of his own self, he hankered after the meretricious glory of a showy performance.
8. OSTRACISM (NOUN): banishment
Synonyms: avoidance, boycott Antonyms: acceptance, allowance
In those days unmarried mothers suffered social ostracism.
9. LABYRINTHINE (ADJECTIVE): mazelike
Synonyms: intricate, complex Antonyms: direct, simple
He would simplify and reform the labyrinthine tax system.
10. CONVICTION (NOUN): belief, opinion
Synonyms: faith, sentiment Antonyms: doubt, disbelief
Now he wants his conviction overturned and is seeking a new trial.