Answer: pulsing

AnswerCrossword Clue
PULSINGAthrob
pulsingTransmit in rhythmical beats
pulsingModulate (a wave or beam) so that it becomes a series of pulses
pulsingApply a pulsed signal to (a device)
pulsingThrob rhythmically; pulsate
pulsingPULSE, to expand and contract rhythmically, also PULSATE