This document lists negative or undesirable words starting with IL, IM, IR and UN. It includes words like illogical, illegal, illiterate, impossible, impatient, irregular, irrational, unhappy, unnecessary and untrue that convey negative meanings, difficulties or limitations.

1. IL
IM
IR
UN
-illogical
-illegal
-illiterate
-illiberal
-illegible
-impossible
-impatient
-immortal
-imperfect
-immature
-irregular
-irresponsible
-irreparable
-irrational
-irrelevant
-Uncountable
-unhappy
-unnecessary
-untrue
-unfriendly