behalf
/bɪˈhɑːf/noun
(用于短语 on ( <美> 亦作in) behalf of 或on someone's behalf)
1
- in the interests of a person, group, or principle为了（个人或团体）的利益, 为了维护（某个原则）：
he campaigned on behalf of the wrongly convicted four.
他为那四个受到错判的人奔走呼吁。
2
- as a representative of代表：
he had to attend the funeral on Mama's behalf.
他只好代表妈妈参加丧礼。
3
- on the part of; done by就…而言, 在…一方;由…做的：
this wasn't simply a philanthropic gesture on his behalf.
这不单纯是他做出的慈善姿态。
词源
Middle English: from a mixture of the earlier phrases on his halve and bihalve him, both meaning 'on his side' （see BY， HALF）.