beef up
v.
"add strength," 1941, from college slang, from beef, n. in slang sense of "muscle-power" (1851).
| 词汇 | beef up |
| 词根词缀 | Online Etymology Dictionary beef up v. "add strength," 1941, from college slang, from beef, n. in slang sense of "muscle-power" (1851). |
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