undertaker

n
1.one who acts on behalf of another,one who takesup a challenge for another代表他人者，代人应战者。
△ Tw.3.4.353 (318):“If you be an undertaker,I amfor you. ”既然你是管人闲事的人，我就来斗你。
2. one who deals with another for another,(probablywith a play on) one who manages funerals （为别人）对付另一个人的人，（可能双关）承办丧礼者。
△Oth.4.1.223(211):“And for Cassio,let me be his undertaker.”i.e.let me deal with him. let me dispose of him. 至于凯西奥，让我去对付他(又译：打发他)。