'assurgent' originates from Latin, specifically the present participle form 'assurgēns' of 'assurgere,' where the prefix 'ad-' (assimilated to 'as-') meant 'to/toward' and 'surgere' meant 'to rise.'

'assurgent' changed from Medieval/ Late Latin 'assurgēns' (present participle) into English usage (chiefly in learned, poetic, or archaic contexts) as 'assurgent.'

Initially, it meant 'rising up' in a literal sense in Latin; over time it retained that sense and also developed figurative uses meaning 'surging' or 'increasing rapidly' in English.