Basic Guidelines For English Spellings
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See US English definition of hum
See UK English definition of hum
See Spanish definition of tararear
1‘the engine was humming and ready to go’
2‘humming a tune’
3‘the repair shops are humming as the tradesmen set about their various tasks’
be quiet
4‘when the wind drops this stuff really hums’
1‘a low hum of conversation’
‘they waste a lot of time humming and hawing before going into action’
be decisive