Vocabulary: impassive

Tutoring English, vocab is always important. The tutor mentions impassive.

impassive: revealing no emotional response.

I may’ve seen the word impassive more often in past decades than today. Yet, I observe impassivity in people more often now than then.

Source:

Mish, Frederick C. Merriam-Webster Dictionary. Springfield: Merriam-Webster, 2004.