'after-registration' originates from Modern English, specifically formed from the preposition 'after' and the noun 'registration', where 'after' meant 'later in time' and 'registration' meant 'the act of recording or enrolling'.

'after-registration' is a modern compound formed by combining 'after' (from Old English æfter) with 'registration' (from Latin registratio via Middle English); it did not descend from a single older compound but arose by straightforward compounding in Modern English.

Initially the components separately meant 'after' and 'the act of recording'; the compound's meaning as 'occurring after registration' is a direct combination and has remained stable.