transcription, транскрипция: [ θrʌm ]
( thrums, thrumming, thrummed)
When something such as a machine or engine thrums , it makes a low beating sound.
The air-conditioner thrummed.
VERB : V
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Thrum is also a noun.
...the thrum of refrigeration motors...
My head was going thrum thrum thrum.
N-COUNT ; SOUND