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1. Oxford Dictionary

   hum

   • IPA[hʌm]

   英式

   • v.
     make a low, steady continuous sound like that of a bee；sing with closed lips
   • n.
     a low, steady continuous sound；an unwanted low-frequency noise in an amplifier caused by variation of electric current, especially the alternating frequency of the mains.

   • verb: hum, 3rd person present: hums, gerund or present participle: humming, past tense: hummed, past participle: hummed

2. • 釋義
   • 片語

   v.

   動詞

   • 1. make a low, steady continuous sound like that of a bee the computers hummed 同義詞 purr, whir, throb, vibrate, murmur, ... 更多buzz, thrum, drone, literarysusurrate, bombinate
   • ▪ sing with closed lips he hummed softly to himself she was humming a cheerful tune 同義詞 sing, croon, murmur, drone
   • ▪ (of a place) be filled with a low, steady continuous sound the room hummed with an expectant murmur
   • 2. informal be in a state of great activity the house was humming with preparations for the dance 同義詞 be busy, be active, be lively, buzz, bustle, ... 更多be bustling, be a hive of activity, throb, vibrate, pulsate, pulse反義詞 be quiet
   • 3. British informal smell unpleasant when the wind drops this stuff really hums 同義詞 smell, stink, stink to high heaven, reek, have a bad smell, ... 更多be malodorous, informalpong

   n.

   名詞

   • 1. a low, steady continuous sound the hum of insects a low hum of conversation
   • ▪ an unwanted low-frequency noise in an amplifier caused by variation of electric current, especially the alternating frequency of the mains.

   片語

   • hum and haw