1. Adamant
a- "not" + daman "to conquer, to tame"
(adjective) Firm in purpose or opinion, unyielding, obdurate, implacable, inflexible; (noun) an extremely hard substance

2. Brouhaha
Gamillscheg to have been, in medieval theater, "the cry of the devil disguised as clergy."
This is the South Korean Senate floor.
If C-Span aired stuff like this, I would watch senate hearings more often.
Obama roundhouses Senator Boehner, and drop kicks Steele.
(noun) a confused hodgepodge of sounds, hubbub; an uproar or commotion that goes far beyond what is justified
Synonyms: furor, hullabaloo, tumult, pandemonium

3. Bulwark
bolwerc, from bole "plank, tree trunk"
bolwerc, from bole "plank, tree trunk"
(noun) a strong defense or protection, a solid wall-like structure for defense; (verb) to provide such a defense or protection
Synonyms: stronghold, citadel, bastion, rampart
Antonyms: breach weak point in the defense

4. Choleric (adjective) easily made angry, bad-tempered.
cholericus, from Gk. kholerikos
(adjective) easily made angry, bad-tempered.
Synonyms: irascible, testy, splenetic, bilious
Antonyms: affable, genial, even-tempered

5. Cloy
Latin inclavare "drive a nail into a horse's foot when shoeing," from Latin clavus "a nail"
(noun) to spoil or destroy an appetite by too much indulgence in sweet or rich things; to glut, satiate, surfeit

6. Curtail
curtus; see curt) + -ault pejorative suffix of Germanic origin
(verb) to cut short, bring to a halt or end sooner than expected; to reduce
Synonyms: limit, abbreviate, abridge, contract
Antonyms: protract, extend

7. Deference
(noun) courteous yielding to the wishes and ideas of another person; great respect marked by submission, as to a superior
Synonyms: respect, consideration, courtesy
Antonyms: contempt, disrespect, scorn, disdain

8. Bolt is the fastest man. Period.
Definitive
Bolt is the fastest man. Period.
(see de-) + finire "to bound, limit," from finis "boundary, end"
(adjective) conclusive, final, representing the limit of what can be done
Synonyms: exhaustive, authoritative
Antonyms: tentative, inconclusive

9. Demeanor
(see de-) + mener "to lead, direct,"
(noun) the way a person behaves, overall impression made by comportment, manner, etc.; facial appearance, mien.
Synonyms: conduct, behavior, bearing, carriage

10. enigmatic
Latin aenigma "riddle,"
(adjective) puzzling, perplexing, inexplicable, not easily understood
Synonyms: baffling, mysterious, inexplicable
Antonyms: intelligible, understandable, fathomable

11. Impromptu
in- + promptu =
pro- "before, forward, for" + emere
(adjective) without preparation, offhand, suddenly or hastily done; (noun) an extemporaneous composition or remark; a minimal piece suggestive of improvisation
Synonyms: spontaneous, improvised, unrehearsed
Antonym: rehearsed, planned, prepared, premeditated.

12. Mawkish
from Middle English
mawke "maggot"
(adjective) excessively and objectionably sentimental; having a mildly sickening flavor.
Synonyms: sentimentalized, maudlin, mushy, nauseating
Antonyms: unsentimental, callous, insensitive

13. Mollify
mollificus "softening," from Latin mollis "soft" (see melt (v.)) + root of facere "to make"
(verb) to soften, make gentle, pacify; to calm, allay (as an emotion), assuage, appease, placate; to reduce intensity
Antonyms: enrage, anger, aggravate, exacerbate

14. Onus
Latin onus probandi (1722), literally "burden of proving."
(Noun) something that is heavy or burdensome (especially an unwelcome responsibility); stigma; blame.
Synonyms: burden, obligation, duty, stigma

15. Presentiment (noun) a vague sense of approaching misfortune
Red sky in morning…
(noun) a vague sense of approaching misfortune
Synonyms: foreboding, premonition, hunch

16. Profligate
(adjective) given over to dissipation and self-indulgence, immoral; recklessly extravagant; (noun) a person given to self-indulgent and wild spending
Synonyms: prodigal, improvident, spendthrift
Antonyms: penny pinching, frugal, economical

17. Remit
(verb) to send or hand in (as money); to cancel (as a penalty or punishment) forgive, pardon; to lessen, diminish; to put off, postpone, defer .
Synonyms: pay, absolve, subside, abate

18. Requisite
(adjective) needed, necessary, regarded as essential or indispensable
Synonyms: required, obligatory, incumbent
Antonyms: nonessential, superfluous, optional

19. Sartorial
Bob’s next stop is the salon for a little eyebrow shaping.
(adjective) of or pertaining to a tailor or his work; having to do with clothes or dress (especially men’s)

20. Thwart (verb) to oppose successfully, to prevent, frustrate
Synonyms: foil baffle
Antonyms: aid, assist, abet, further