thrum
verbUK /θrʌm/
US /θrʌm/
To make a low, steady sound like a drum or a humming string.
The old guitar thrummed softly as she strummed it.
OTHER MEANINGS
2. To play a stringed instrument in a light, steady way.
He thrummed the strings of his banjo on the porch.
3. A low, continuous humming or drumming sound.
The thrum of the engine lulled the baby to sleep.
4. The fringe or loose threads at the edge of woven cloth.
The thrum of the old blanket was frayed and soft.