anesthesia

The story

1. Ancient Greek · derived fromἀναισθησία“without sensation”
2. New Latin · borrowed fromanaesthēsia
3. English todayanesthesia

Sense of “insensibility” attested since 1679, from New Latin anaesthēsia, from Ancient Greek ἀναισθησία (anaisthēsía, “without sensation”), from ἀν- (an-, “not”) and αἴσθησις (aísthēsis, “sensation”). By surface analysis, an- + -esthesia. Sense of “state induced by an agent” attested since 1846.