throb/θrɑb/Third PersonthrobsPresent ParticiplethrobbingPast TensethrobbedPast Participlethrobbed1expand and contract rhythmically; beat rhythmicallySynonyms: pulsatepulse2pulsate or pound with abnormal force3tremble convulsively, as from fear or excitementSynonyms: thrillshuddershiver