decisive
adj.
1610s, from Medieval Latin decisivus, from Latin decis-, past participle stem of decidere (see decide). Related: Decisively; decisiveness.
〔李〕[decis =to decide决定的；-ive⇒“having the quality of deciding具有决定性质的”→] a. giving a clear decision or re-sult决定性的；明确的；果断的
〔蒋〕[cid，cis=cut，kill 切，杀，-ive形容词后缀，…的] 决定性的