The word 'vacate' originates from the Latin verb 'vacāre', meaning 'to be empty, unoccupied, or free from something'. This Latin root is itself derived from the Proto-Indo-European eue-, a root associated with lacking or being empty. The suffix '-ate' was added in English, borrowed from the Latin participial ending '-atus', to form a verb indicating the act of making something empty. Thus, the literal sense of 'making empty' evolved into the modern meanings of leaving a place (making it empty) or annulling a legal order (making it void or empty of force).

Structure: vac (empty) + ate (verb suffix) vac (from Latin 'vacāre', meaning 'to be empty, free, or at leisure'); ate (a verb-forming suffix of Latin origin, indicating an action or process).