muscle 词源(Etymology) - 趣词词源[英文版]

muscle [muscle 词源字典]: muscle: [16] Ultimately, muscle and mussel [OE] are the same word, and both owe their origin to a supposed resemblance to a mouse. They go back to Latin mūsculus, literally ‘little mouse’, a diminutive form of mūs ‘mouse’, which was applied to the shellfish because of a similarity in shape and colour, and to ‘muscle’ because the shape and movement of certain muscles beneath the skin, such as the biceps, reminded people of a mouse.

Latin mūsculus ‘mussel’ was borrowed into Old English as muscle or muxle; the -ssspelling began to emerge in the 15th century, inspired by Middle Low German mussel (which came from *muscula, a Vulgar Latin feminization of Latin mūsculus and source of French moule ‘mussel’) and reinforced in the 16th century by the introduction via Old French of muscle for ‘muscle’.

The notion of resemblance to a mouse also lies behind English musk.
=> mouse, mussel[muscle etymology, muscle origin, 英语词源]
muscle (n.): late 14c., from Middle French muscle "muscle, sinew" (14c.) and directly from Latin musculus "a muscle," literally "little mouse," diminutive of mus "mouse" (see mouse (n.)).

So called because the shape and movement of some muscles (notably biceps) were thought to resemble mice. The analogy was made in Greek, too, where mys is both "mouse" and "muscle," and its comb. form gives the medical prefix myo-. Compare also Old Church Slavonic mysi "mouse," mysica "arm;" German Maus "mouse; muscle," Arabic 'adalah "muscle," 'adal "field mouse." In Middle English, lacerte, from the Latin word for "lizard," also was used as a word for a muscle.
Musclez & lacertez bene one selfe þing, Bot þe muscle is said to þe fourme of mouse & lacert to þe fourme of a lizard. [Guy de Chauliac, "Grande Chirurgie," c. 1425]
Hence muscular and mousy are relatives, and a Middle English word for "muscular" was lacertous, "lizardy." Figurative sense of "force, violence, threat of violence" is 1930, American English. Muscle car "hot rod" is from 1969.
muscle (v.): 1913, "to accomplish by strength," from muscle (n.). Related: Muscled; muscling. To muscle in is 1929 in underworld slang.