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restrained (adj.)
[restrained 词源字典]
"repressed, kept under control," 1570s, past participle adjective from
restrain
.
[restrained etymology, restrained origin, 英语词源]
unconstrained (adj.)
1640s, from
un-
(1) "not" + past participle of
constrain
(v.). Related:
Unconstrainedly
.
unrestrained (adj.)
1580s, from
un-
(1) "not" + past participle of
restrain
(v.). Related:
Unrestrainedly
.