ächten

to banish, ostracize, outlaw (expel someone from society and declare them unprotected by law)

to ostracize, shun (look down upon someone and refuse to associate with them)

"Als Demokraten sollten wir Andersdenkende achten und nicht ächten."

to proscribe, outlaw, ban (declare something unacceptable)

"Dumdum-Geschosse sind international geächtet."