Many companies have blacklisted him due to his history of misconduct.

blacklisted 是动词 blacklist 的过去分词形式，表示"被列入黑名单"。blacklist 由 black（黑色）和 list（名单）组成，字面意思是"黑名单"，指将某人或某物列入禁止或限制的名单中。