| 单词 | hum | 
| 释义 | hum1 of 2verb   ˈhəm    hummed; humming   intransitive verb 1  a    : to utter a sound like that of the speech sound \\m\\ prolonged  humming along with the music  b    : to make the natural noise of an insect in motion or a similar sound : drone  listening to the bees hum in the garden  c    : to give forth a low continuous blend of sound  the sound of children's voices with which the house was always humming 2  a    : to be busily active  the museum hummed with visitors  b    : to run smoothly  the business started to hum transitive verb 1   : to sing with the lips closed and without uttering speech sounds distinctly  hum a tune 2   : to express by making a vocal sound with the lips pressed together : to affect by humming  hummed his displeasure  hum noun   hummable   ˈhə-mə-bəl adjective hum2 of 2 chiefly British spelling of hem entry 3, hem entry 4 hum 1 of 2 nounas in purra monotonous sound like that of an insect in motion we heard the hum of an outboard motor and a few minutes later the small craft came into sight Synonyms & Similar Words Relevance 
 Antonyms & Near Antonyms 
 hum2 of 2 verb1 as in to buzzto be copiously supplied one restaurant was humming with diners, while a neighboring eatery was practically empty Synonyms & Similar Words 
 Antonyms & Near Antonyms 
 2 as in to whirto fly, turn, or move rapidly with a fluttering or vibratory sound a helicopter hummed overhead Synonyms & Similar Words 
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