cathouse

The word 'cathouse' is a transparent English compound formed from two native Germanic roots. The first element, 'cat', has a long but obscure lineage in European languages, likely entering Latin and subsequently Germanic tongues via trade routes. The second element, 'house', derives from a solid Proto-Germanic root for a dwelling. When combined literally, the term logically denotes a building for cats. Its slang meaning as a brothel emerged in 20th-century American English, employing 'cat' as a slang term for a prostitute and 'house' in its established sense for a place of business, thus creating a metaphorical extension based on colloquial usage rather than etymological evolution of the roots themselves.

Structure: cat (animal) + house (building) - cat: From Old English 'catt', from Late Latin 'cattus', of uncertain ultimate origin, possibly from an Afro-Asiatic language. Denotes the feline animal. - house: From Old English 'hūs', from Proto-Germanic 'hūsą', meaning a dwelling, shelter, or building.