1. (

• hum ,
• thrum ,

) sound with a monotonous hum ;

2. (

• strum ,
• thrum ,

) sound the strings of (a stringed instrument); "strum a guitar" ;

3. (

• drum ,
• beat ,
• thrum

) make a rhythmic sound; "Rain drummed against the windshield"; "The drums beat all night" ;