6 letters · 14 points in Scrabble
noun as the agent of or on someone's part (usually expressed as rather than )
noun for someone's benefit (usually expressed as `in behalf' rather than `on behalf' and usually with a possessive)
originFrom Middle English bihalve (“nearby”), from Old English bī healfe (“by [his/her] side”), from bī (“by”) + healfe (“side, half”), equivalent to be- + half.
Etymology from Wiktionary, CC BY-SA 3.0