"Tremolo" is a word in ENGLISH

tremolo ENGLISH
Definition:

The rapid reiteration of tones without any apparent
cessation, so as to produce a tremulous effect.

tremolo ENGLISH
Definition:

A certain contrivance in an organ, which causes the notes
to sound with rapid pulses or beats, producing a tremulous effect; --
called also tremolant, and tremulant.

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quaver ENGLISH

Especially, to shake the voice; to utter or form sound with rapid or tremulous vibrations, as in singing; also, to …

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quaver ENGLISH

A shake, or rapid and tremulous vibration, of the voice, or of an instrument of music.

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