'antifeudalistic' originates from 'Greek' and 'Medieval Latin' elements: specifically the prefix 'anti-' (Greek 'anti') meaning 'against' and the element 'feudalistic' ultimately from Medieval Latin 'feodum/feodalis' ('feudum') meaning 'fief' or 'land held as a fief'.

'antifeudalistic' changed from the combination of the prefix 'anti-' with the adjective 'feudal' (English, from Old French/Medieval Latin 'feudal' < Medieval Latin 'feodalis' < Latin 'feodum'), forming 'feudalistic' and later 'antifeudalistic' in modern English.

Initially the roots referred specifically to the institution of 'fief' or 'fiefdom', but over time the compound 'antifeudalistic' has come to mean broadly 'against feudal social or political arrangements'.