- decisive (adj.)
[decisive 词源字典]
- 1610s, from Medieval Latin decisivus, from Latin decis-, past participle stem of decidere (see decide). Related: Decisively; decisiveness.[decisive etymology, decisive origin, 英语词源]
- indecisive (adj.)
- 1726, from in- (1) "not, opposite of" + decisive. Related: Indecisively; indecisiveness.