commodiousyoudaoicibaDictYouDict[commodious 词源字典]
commodious: [15] Latin commodus meant ‘convenient’. It was a compound adjective formed from com- ‘with’ and modus ‘measure’, and thus meaning literally ‘conforming with due measure’. From it was derived the medieval Latin adjective commodiōsus, which passed, probably via French commodieux, into English. This originally meant ‘advantageous, useful, convenient’, and it was not really until the 16th century that it developed the meaning ‘affording a conveniently large amount of space’.

The noun derivative commodity entered English in the 14th century, and from earliest times had the concrete meaning ‘article of commerce’, deriving from the more general sense ‘something useful’. Commodus was borrowed into French as commode ‘convenient’, which came to be used as a noun meaning both ‘tall headdress for women’ and ‘chest of drawers’. English adopted the word in the 17th century, and in the 19th century added the new sense ‘chair housing a chamber pot’ (a semantic development paralleling the euphemistic use of convenience for lavatory).
=> commode, commodity[commodious etymology, commodious origin, 英语词源]
commodious (adj.)youdaoicibaDictYouDict
early 15c., "beneficial, convenient," from Medieval Latin commodiosus "convenient, useful," from Latin commodus (see commode). Meaning "roomy, spacious" first attested 1550s. Related: Commodiously; commodiousness.