The opposite would be for, in favor of, in support of, or advocating.
against, or opposed to. Alternatively opposite, for example the Anti-Christ is the opposite of Christ.
won't
for
The 4-letter root word meaning against or opposite is "anti."
the head is on the opposite side cause he was against slavery
It is Fore e.g I am against them or I am Fore them.
Opposite, against, as opposed to, anti, in the opposite direction
non preferred
against, in front of, opposite to
The opposite of a promoter is a detractor, someone who undermines or speaks against something.
Anti means against or opposite. If someones anti racist then they are against racism.
"go against," from Old.Fr. countre "facing opposite." or from Latin: contra "opposite, contrary to, against". sources from Etymology Dictionary By Samantha Seeboonruang