Main entry: influential
Definition: having or exercising influence or power
Usage: an influential newspaper; influential leadership for peace
Antonyms: uninfluential
Definition: not influential
Antonyms: unimportant
Definition: not important
Antonyms: powerless
Definition: lacking power
Antonyms: impotent
Definition: lacking power or ability
Antonyms: impotent
Definition: (of a male) unable to copulate