- unrestrained (adj.)
[unrestrained 词源字典]
- 1580s, from un- (1) "not" + past participle of restrain (v.). Related: Unrestrainedly.[unrestrained etymology, unrestrained origin, 英语词源]
- wanton (v.)
- "to revel, frolic unrestrainedly," 1580s, from wanton (adj.). Related: Wantoned; wantoning.