whence
adverb /wens/
/wens/
(old use)- from where
从何处；从哪里 - They returned whence they had come.
他们从哪里来又回到哪里去了。
词源Middle English whennes, from earlier whenne (from Old English hwanon, of Germanic origin) + -s (later respelled -ce to denote the unvoiced sound). - They returned whence they had come.