adjective
- without emotion; apathetic; unmoved.
- calm; serene.
- unconscious; insensible.
- not subject to suffering.
adjective
- not revealing or affected by emotion; reserved
- calm; serene; imperturbable
- rare unconscious or insensible
1660s, “not feeling pain,” from assimilated form of in- “not, opposite of” (see in- (1)) + passive. Meaning “void of emotions” is from 1690s. Related: Impassively; impassiveness (1640s).