1. maladroit (adj.) unskillful, clumsy, lacking in adroitness
He managed the meeting in a maladroit way. He has an excuse: it was his first time being a project manager.
Synonyms: Antonyms:
tactless adroit
awkward skillful

2. transient (transitory)
(adj.) not lasting or enduring, fleeting
transient guest of the hotel
Synonyms:
temporary

3. onus (n.) burden, responsibility
You have taken the onus of writing and rewriting your essays until you are satisfied with your work.
Synonyms:
blame
duty

4. fait accompli [fe ta-kawn-plee]
  an accomplished fact, a thing already done
The enemy's defeat was a fait accompli long before the formal surrender.

5. dastardly [das-terd-lee]
(adj.) cowardly, sneaking
Not facing the facts was a dastardly act.
Synonyms: Antonyms:
Fearful bold
Low brave
Base courageous daring

6. inebriated (adj.) drunk, intoxicated, tipsy
He was so inebriated that he had to call a cab.
Antonyms:
Sober
straight