Afterwards
来自Big Physics
Old English æftewearde, from æftan ‘aft’ + -wards, influenced by after.
wiktionary
From Middle English[Term?], from Old English æfteweard(“behind”) + -s(“( adverbial genitive)”). Surface analysis is after + -wards.
etymonline
afterwards (adv.)
c. 1300, from afterward (q.v.) + adverbial genitive -s.
