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padlock (n.)
[padlock 词源字典]
"removable lock," late 15c., from
lokke
(see
lock
(n.)), but the first element is of unknown origin.
[padlock etymology, padlock origin, 英语词源]
padlock (v.)
1640s, from
padlock
(n.). Related:
Padlocked
;
padlocking
.