palpitate; throb; thump
1. palpitate; throb; thump
For one's heart to keep beating because one has been startled or scared by something.
2. feel nausea; feel sick
To feel like vomiting continuously because one feels sick in their stomach.
3. waver; fluctuate
For a wave to keep rising and falling.
4. waver; move in a wavelike pattern
For a thin board, etc., to keep swaying as if it were being bent.