throb - definition and synonyms

verb [intransitive] 

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/θrɒb/
present tense
I/you/we/theythrob
he/she/itthrobs
present participlethrobbing
past tensethrobbed
past participlethrobbed
  1. 1
    if a painful part of your body throbs, the pain comes and goes again and again in a regular pattern
  2. 2
    if something such as an engine or a machine throbs, it makes a low sound that is repeated steadily