behalf: [14] Behalf was compounded from the prefix be- ‘by’ and the noun half, in the sense ‘side’. The latter had been used in such phrases as on my half, that is, ‘on my side, for my part’, since late Old English times, and the new compound began to replace it in the 14th century. (That particular use of half had died out by the end of the 16th century.) The modern sense of ‘representing or in the interests of someone’ was present from the beginning. => half
behalf (n.)
c. 1300, behalve (with dative suffix), from Old English (him) be healfe "by (his) side," and on (his) healfe "on (his) side," from healfe "side" (see half).
例文
1. 「What do you mean？"I asked，offended on Liddie 's behalf .
「どういう意味だ？」私は尋ねた、リディのために憤慨した。
2.Secret Service officer Robin Thompson spoke on behalf of his colleagues.
捜査官ロビン?トンプソンが同僚を代表して発言した。
3.Paratroopers and foot-soldiers entered the building on the government 's behalf .
傘兵と歩兵は政府を代表してビルに入る。
4.I thanked my parents for all their self-sacrifice on my behalf .
私は両親が私のためにしてくれたすべての自己犠牲に感謝します。
5.They asked my father to intercede with the king on their behalf .