The adjective redundant means something unnecessary, especially of a word, a phrase, etc., because it is more than is needed.

Synonyms are excessive, repetitious, superfluous, or inessential.

The word origins from Latin (1590s) redundantem, present participle of redundare, literally “overflow, pour over, be over-full”, figuratively “be in excess” from re– meaning “again” plus undare meaning “rise in waves”, from unda “a wave”.

I can’t listen again to his redundant argument.

Don’t try to use this word in the same sentence again, it will be redundant.

Stop her when she becomes redundant or boorish.