'Power' traces to PIE *poti- (lord, master) — the same root behind 'possible,' 'potent,' and 'despot.'
The ability or capacity to do something or act in a particular way; political or social authority or control.
From Old French 'poeir' (to be able), used as a noun, from Vulgar Latin *potēre (to be able), replacing Classical Latin 'posse' (to be able, to have power), from 'potis' (powerful, able, master) + 'esse' (to be). The PIE root is *poti- (powerful, lord, master). The same root produced 'possible,' 'potent,' 'despot,' and