delegate

Delegate comes from Middle English delegat, borrowed via Old French delegat from Latin dēlēgātus, the past participle of dēlēgō, meaning 'to send, assign, delegate.' It shares this root with legate.

The noun and adjective both trace back to that same Latin past participle — in fact, delegate was used as a past participle and adjective in English up through Early Modern English, before settling into its modern noun and verb roles.

It's related to legate, another word rooted in the same Latin sending-and-assigning idea.