dormantyoudaoicibaDictYouDict[dormant 词源字典]
dormant: [14] Like dormitory and dormer, dormant comes ultimately from Latin dormīre ‘sleep’, which is related to Sanskrit drā- ‘sleep’ and Russian dremat’ ‘doze’. Dormant was borrowed from French dormant, the present participle of dormir ‘sleep’, while dormitory [15] comes from Latin dormītōrium, a derivative of the past participle of dormīre. Dormer [16], from Old French dormeor, a derivative of dormir, originally signified a ‘dormitory window’. (It is not clear whether dormouse [15] is related, but if it is it would mean literally ‘sleeping mouse’, or conceivably even ‘sleeper’, from French dormeuse, the feminine of dormeur ‘sleeper’.)
=> dormer, dormitory[dormant etymology, dormant origin, 英语词源]
dormouse (n.)youdaoicibaDictYouDict
early 15c., possibly from Anglo-French *dormouse "tending to be dormant" (from stem of dormir "to sleep," see dormer), with the second element mistaken for mouse; or perhaps it is from a Middle English dialectal compound of mouse and Middle French dormir. The rodent is inactive in winter. French dormeuse, fem. of dormeur "sleeper" is attested only from 17c.