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unlock (v.)
[unlock 词源字典]
c. 1400, from
un-
(2) "reverse, opposite of" +
lock
(v.). Figurative sense is attested from 1530s. Old English had
unlucan
"to unlock, open." Related:
Unlocked
;
unlocking
.
[unlock etymology, unlock origin, 英语词源]
[unlock 词源字典]