Front

Lacking energy and enthusiasm, uninterested.

Back

listless

Front

Based on an assumption or guess

Back

Hypothetical

Front

One who rebels against authority.

Back

Insurgent

Front

sad, gloomy

Back

morose

Front

distant

Back

remote

Front

sad, sorrowful

Back

doleful

Front

hasty, harsh, or aggressive

Back

brash

Front

illness

Back

malady

Front

indiscriminate, impetuous

Back

arbitrary

Front

to worry

Back

fret