Strum (verb)

1. Play (a stringed instrument) by running the fingers lightly over the strings.
2. Play (a chord or tune) on a stringed instrument by running the fingers lightly over the strings.
3. Play (a guitar or other instrument) in a casual or relaxed way.

Origin:

Early 17th century: probably imitative.

Examples:

1. He strummed his guitar while singing.
2. She strummed a few chords on the piano before starting to play.
3. He strummed an upbeat tune on his ukulele.
4. She strummed a tune on the guitar to accompany the singer.
5. The musician strummed the strings of the banjo to create a rhythmic background for the song.