Etymology of the English word anesthesia
the English word anesthesia
derived from the Latin word anesthesia
derived from the Greek word anaisthesia, ἀναισθησία, ἀναισϑησία
derived from the Greek word aisthesis, αἴσθησις (sensation; perception; discernment)
derived from the Greek word aisthanomai, αἰσθάνομαι (to apprehend (properly, by the senses))
using the Medieval Greek prefix an-, ἀν-