1、under + take.
2、身在其中担任、掌握(take, hold)什么;当然,只有身在其中才能去担任、掌管什么东西了。
3、At here, the under is not the usual word meaning "beneath," but from Old English under, from PIE *enter- "between, among". 另见:understand.
undertake 承担词源理解存争议。under-, 来自inter-变体,在里面,词源同interact, understand, take, 带走,承担。即承担起来的。