English

electrotherapy

From electro- + therapy.

Ancient Greek ἤλεκτρον ‘amber’

French electrum

French électro-

Ancient Greek θεράπων ‘attendant, aide’

Ancient Greek θεραπεύω ‘to serve, treat medically’

Ancient Greek θεραπεία ‘service, medical treatment’

New Latin therapīa ‘therapy’

Today it means

noun The use of electrical energy as a medical treatment.

Language periods are conventional ranges, not dates for this word.

Etymograph / electrotherapy