'comprehensively-detailed' is a compound built from 'comprehensively' and 'detailed'. 'Comprehensively' comes from the adjective 'comprehensive' + the adverbial suffix '-ly'; 'comprehensive' ultimately derives from Latin 'comprehensivus', from the verb 'comprehendere' where 'com-' meant 'together' and 'prehendere' (or 'prehens-') meant 'to seize/grasp'. 'Detailed' comes from the noun/verb 'detail', from Old French 'detail'/'detailler', where the prefix 'de-' implied 'off/from' and 'tailler' meant 'to cut'.

'comprehensive' developed via Late Latin and Anglo-French into Middle English forms and then Modern English 'comprehensive'; adding '-ly' produced 'comprehensively' in later English. 'Detail' entered English from Old French 'detaillier' and became the noun and verb 'detail' in Middle English; the adjective/past-participle form 'detailed' arose as the language used participial forms to describe nouns. The compound phrase 'comprehensively detailed' is a modern English collocation formed by combining these elements.

Originally, Latin roots conveyed physical actions ('to grasp' for 'comprehendere' and 'to cut' for 'tailler'). Over time these developed abstract senses: 'comprehensive' came to mean 'covering broadly or completely', and 'detail' came to mean 'individual particular(s)'; together the compound evolved to mean 'covering the particulars thoroughly'.