Etymology of authenteo: from 'self-doer' to 'authority'

The root of authenteo comes from auto- ('self') + hentes (related to accomplishing/doing), giving a basic etymology of 'self-doer' or 'one who acts on their own authority.' In Classical Greek, this developed into meanings of 'murderer' (one who kills with their own hand) and 'perpetrator.' By the Hellenistic/Koine period, the meaning had shifted to 'one who has authority' or 'master.' Mike notes that etymology alone is not decisive for NT meaning — what matters is how the word was actually used in the NT era, not its ancient roots. He warns against the 'etymological fallacy' of reading ancient root meanings into later usage.