insensible
unable to feel, notice, or respond
Roots
- -able / -ible: able to be, fit to be, or worthy of
- im- / in- (not): not or without
- sent / sens: feel, sense, perceive, or think
Other words with the sent / sens root
- dissent: to disagree or hold a different opinion
- sensation: a feeling or perception
- sensational: exciting, dramatic, or meant to stir feeling
- sense: feeling or perception
- sentiment: feeling or opinion
- sentimental: too strongly shaped by tender feeling
Sense is the hook. Insensible means sense is blocked: the person or system cannot feel or notice what is there.
He seemed insensible to the discomfort his joke had caused.