List 3 (im-, in-, un-, -ful)

Front

impossible

Back

not possible

Front

impatient

Back

not patient

Front

impulsive

Back

to act without thinking, to act without waiting for the beat of your "pulse"

Front

immoral

Back

not moral or right

Front

immature

Back

not mature

Front

inaccurate

Back

not accurate or correct

Front

inefficient

Back

not efficient, not using time wisely

Front

ineffective

Back

not effective, not useful

Front

insecure

Back

not secure

Front

inadequate

Back

not adequate (good enough)