Why am I the only person anwering these?


Ob- Latin prefix, meaning towards, so obnoxious is being noxious towards someone.

In- in words derived from Latin and Old English prefix, used to from verbs with the sense in. sometimes used as to from other parts of speech, sometimes used as an intensive or almost meaningless prefix, or to form a negative in words with latin roots.

im- same as in-, but used for words beginning b,m or p

il- same as in-, but used for words beginning l

ir- same as in-, but used for words beginning r