Tempos such as vivace (Italian), allegro(Italian), or schnell (German) can usually define a "quick tempo."
Rallentando means slowing the tempo
I would suppose 'ostinato' or, repeat
Adagio is a tempo in music that is very slow.
If you are talking about tempo, it would be [Quarter Note] = [BPM].
The Italian musical term morendo indicates a decrease in volume or tempo, but often affects both; to make the sound slowly die away.
The Italian word for quick tempo is "allegro." In musical terminology, "allegro" indicates a lively and fast pace. It is commonly used to describe the speed at which a piece of music should be played.
Usually allegro or allegretto can describe a "very fast" tempo.
Allegretto
cheerful or brisk; but commonly interpreted as lively, fast
The term you're looking for is "allegro." In music, allegro indicates that a piece should be played at a lively and quick tempo, often conveying a cheerful and upbeat character. It is commonly used as a tempo marking in musical compositions.
The proper musical term for increasing the tempo is "accelerando."
In music, the term "retard" is used to indicate a gradual slowing down of the tempo, adding a sense of tension and anticipation to the music.
Tempo.
"Or else" in English means ossia in Italian musical terminology.
The Italian musical term for a cheerful or fast tempo is "Allegro."
Labradford
The correct musical term for decreasing the tempo in a piece of music is "ritardando."