| 单词 | hum |
| 释义 | hum 1. v. & n. --v (hummed, humming) 1. intr. make a low steady continuous sound like that of a bee. 2. tr. (also absol.) sing (a wordless tune) with closed lips. 3. intr. utter a slight inarticulate sound. 4. intr. colloq. be in an active state (really made things hum). 5. intr. Brit. colloq. smell unpleasantly. --n 1. a humming sound. 2. an unwanted low-frequency noise caused by variation of electric current, usu. the alternating frequency of the mains, in an amplifier etc. 3. Brit. colloq. a bad smell. Phrases and idioms hum and haw (or ha) hesitate, esp. in speaking. Derivatives hummable adj. hummer n. Etymology: ME, imit. 2. int. expressing hesitation or dissent. Etymology: imit. |
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