'assort' originates from Old French, specifically the word 'assortir', where the prefix 'a-' (from Latin ad-) meant 'to' and 'sortir/sort' related to 'lot, kind'.

'assort' changed from Old French 'assortir' and Middle English forms such as 'assorten' and eventually became the modern English verb 'assort'.

Initially it meant 'to distribute or share by lot', but over time it evolved into meanings such as 'to arrange or classify' and 'to be of a kind/agree'.