'exhaustive' originates from Latin, specifically the word 'exhaurire', where 'ex-' meant 'out' and 'haurire' meant 'to draw out'. 'detailed' originates from Old French, specifically the word 'detail' (from 'detaillier'), where 'de-' (from Latin 'de-') meant 'of/away' and 'tail' (from Old French 'tailer') meant 'to cut.'

'exhaustive' changed from Latin 'exhaurire' into Medieval/Anglo-Latin and Middle English forms (leading to 'exhaust') and later developed the adjectival form 'exhaustive' in modern English. 'detailed' changed from Old French 'detail'/'detaillier' into Middle English 'detail' and then the past-participial/adjectival form 'detailed' in modern English.

Initially, 'exhaustive' was related to the literal action 'to draw out' and 'detail' originally referred to a 'cutting into pieces' or 'small part'; over time 'exhaustive' evolved to mean 'thorough, complete' and 'detailed' came to mean 'full of particulars'. Combined, 'exhaustively-detailed' now means 'described with complete thoroughness and many particulars'.