'entwine' originates from Middle English, ultimately formed from the prefix 'en-' (from Old French 'en-' meaning 'in, into') + 'twine' (Old English 'twīnan'/'twine' meaning 'to twist').

'entwine' appeared in Middle English (forms such as 'entwinen' or 'entwynen') and developed into the modern English 'entwine'; 'entwinement' is formed by adding the noun-forming suffix '-ment' to the verb.

Initially it meant 'to twist or bind together'; over time it has retained that literal sense while also coming to be used metaphorically for close interconnection or involvement ('entwinement').