impudent: very rude
imprudent: not wise or sensible: not prudent
2. insolent / indolent / redolent
insolent: rude or impolite
indolent: not liking to work or be active
redolent: causing thoughts or memories of something
3. witty / witting
witty: funny and clever
witting: cognizance / news
4. discernible / discerning
discernible: able to be identified as separate and distinct
discerning: able to see and understand people, things, or situations clearly and intelligently
5. exhaustive / exhausted
exhaustive: including all possibilities: very thorough
exhausted: be tired out or worn out
6. aver / avert / averse / avow / advent /advert
aver: to say something in a very strong and definite way
avert: to prevent (something bad) from happening
averse: having an active feeling of repugnance or distaste
avow: to declare or state (something) in an open and public way
advent: second coming
advert: announcement; notification
7. feckless / reckless
feckless: weak and ineffective; worthless;irresponsible
reckless: not showing proper concern about the possible bad results of your actions
8. mean / mien
mien: a person’s appearance or facial expression
9. humdrum / conundrum
humdrum: dull, boring, and ordinary
conundrum: a confusing or difficult problem
10. immune / immure / inure
immure: to enclose within or as if within walls
inure: to cause (someone) to be less affected by something unpleasant