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