'anti-dynastism' is a compound formed in English from the prefix 'anti-' (from Greek 'anti' meaning 'against') + 'dynast-' (from 'dynasty') + the English suffix '-ism' (denoting doctrine or practice).

'dynasty' originates from Greek 'dynasteia'/'dynastēs' (meaning 'power' or 'ruler'), passed into Latin and Old French as 'dynastie', and entered Middle English as 'dynasty'; the productive English prefix 'anti-' (from Greek) and the suffix '-ism' were later combined with the stem to form 'anti-dynastism' in modern political usage.

Built from elements that originally meant 'against' + 'ruler' + 'doctrine', the compound originally and still means 'the doctrine or sentiment opposing rule by dynasties'; its meaning has remained consistent as a descriptive political term.