1. without emotion; apathetic; unmoved.
2. calm; serene.
3. unconscious; insensible.
4. not subject to suffering.
1. emotionless, phlegmatic, stoical, indifferent, undisturbed, unperturbed.
2. tranquil, unruffled, composed.
4. unaffected; unflinching.
Origin: 1660-70; im- + passive
Now YOU come up with a sentence (or fic? or graphic?) that best illustrates the word.