Etymology of the English word anaesthesia
the English word anaesthesia
derived from the New Latin word anaesthesia (anaesthesia)
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-