Tremolo (noun)

1. A rapid fluctuation of pitch in a musical tone, produced by a rapid repetition of the same note.
2. A rapid repeated variation in volume in a musical tone, produced by rapid vibration of the strings or reed.

Origin:

Early 18th century: from italian, from tremare "to tremble".

Examples:

1. The tremolo added a dramatic effect to the violin solo, creating an emotional and intense sound.
2. The tremolo was a characteristic feature of classical Spanish guitar music.
3. The tremolo was produced by the singer's vibrato technique, adding expressiveness to the performance.
4. The tremolo effect was achieved by the use of a special pedal on the electric guitar.
5. The tremolo was a popular effect in pop and rock music, used to create a sense of excitement and energy.