The opposite of apex is antapex.(Nadir is the opposite of one use of apex, to mean zenith.)
An antonym of appeal would be repulsion. Of course, that is if you meant to use "appeal" as a verb. I tried looking it up too and could not find much.
Appeal to the crowd what should we use has a school crest. Then the crowd votes and majority wins
recording equipment (apex)
A persuasive appeal is a strong argument made for a certain position or opinion. One might use a persuasive appeal to convince another to believe one side of a political issue.
Tu
They must avoid overstepping their authority.
Cézanne [Apex]
Ethos (apex)
Ethos
ethos
He uses pathos to appeal to the listeners' suspicion and fear of Germany. (APEX)
Open primaries allow any voters to participate, while closed primaries are restricted to party members Apex :)
look for evidence (apex)
Logos (apex)
Ethos
intro,body&conclusion apex cheating is fun(: