ostinato (noun)

1. During the Renaissance era, composers used ostinato as a compositional technique in their music.

2. The use of ostinato in the symphony added depth and intensity to the paintings displayed in the art gallery.

3. The musician kept playing the same ostinato over and over, driving everyone crazy, as a musical prank.

4. In certain religious ceremonies, an ostinato is played to create a meditative and spiritual atmosphere.