IPA: /ɪˈvɪn.sɪv/
KK: /ɪˈvɪn.sɪv/
Having the ability to show or demonstrate something clearly; serving as evidence or proof.
The evincive nature of her argument convinced everyone in the room.
Evincive is formed from "e-" (meaning out) and "vincere" (meaning to conquer or overcome). The word describes something that effectively demonstrates or proves a point, as if it conquers doubt or disbelief.
Think of something that 'overcomes' ('vincere') doubt or disbelief by showing evidence — that's what evincive means.