Skinny
来自Big Physics
wiktionary
Skin + -y. The meaning associated with lack of fat or muscle possibly derives from the phrase skin and bones; the meaning associated with nudity refers to the exposed skin.
etymonline
skinny (adj.)
c. 1400, "resembling skin," from skin (n.) + -y (2). Meaning "lean, emaciated" is recorded from c. 1600. Of clothes, "tight-fitting" by 1970. In the noun sense of "the truth" it is World War II military slang, perhaps from the notion of the "naked" truth. Related: skinniness.
