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unsettle (v.)
[unsettle 词源字典]
1590s, "undo from a fixed position," from
un-
(2) "reverse, opposite of" +
settle
(v.). Of the mind, feelings, etc., attested from 1640s. Related:
Unsettled
;
unsettling
.
[unsettle etymology, unsettle origin, 英语词源]
[unsettle 词源字典]