'Possible' traces to Latin 'posse' (to be able) — from 'potis esse' (to be powerful). Possibility is power.
Able to be done or achieved; that may exist, happen, or be true without contradicting proven facts, laws, or circumstances.
From Latin 'possibilis' (that can be done, achievable), from 'posse' (to be able), a contraction of 'potis esse' (to be powerful, to be capable), from 'potis' (powerful, able, master), from PIE *pótis (powerful, lord, master). The PIE root *pótis is one of the most fascinating in the family: it links power, mastery, and possibility in a single semantic field. In Sanskrit, 'páti' means 'lord