IPA: /ɪmˈpæsɪvɪti/
KK: /ɪmˈpæsɪvɪti/
The condition of not showing any emotions or feelings; being calm and unresponsive.
Her impassivity during the crisis surprised everyone around her.
Impassivity → It is formed from "im-" (meaning not) and "passivity" (from Latin "passivus", meaning capable of feeling or suffering). The word "impassivity" means the state of being not capable of feeling or suffering, or showing no emotion.
Think of 'not' ('im-') feeling or 'suffering' ('passivity') — that's why impassivity means showing no emotion.