Cause (medicine)
Cause, also called etiology (/ˌiːtiˈɒlədʒi/) or aetiology, is the reason or origination of something.
The word etiology is derived from the Greek αἰτιολογία (aitiología), meaning "giving a reason for" (from Ancient Greek αἰτία (aitía) 'cause' and -λογία (-logía)).