Allegro
Lively, fast.
allegro is fast, presto is very fast.
it's the speed between allegro and vivace, about quarter=144-160. assai itself means very, as in allegro assai, adagio assai, pianissimo assai,etc.
Simply put, this means "not too fast".
Con Brio
'Presto' is one such term. There are others.
When used as an adjective, allegro means of fast tempo. It can also be used as a noun, meaning a passage or movement in a brisk tempo. It can also mean a musical composition.
There are a few musical terms that start with the letter "a": accent, accelerando, accidental, adagio, allargando, allegretto, allegro, andante, andantino, atonal
It is an indication of tempo and the feel of how a section of a musical piece should be played and it is normally written over the first line of the score. Allegro means fast and grazioso means graceful. Many pieces have this direction, so it is not possible to ell which piece you mean from this information alone.
Allegro : Fast Con : With Grazia : Graciousness So, allegro con Grazia means 'Play fast gracefully' or perhaps, 'Play fast with graciousness'.
The question is meaningless. Symphonies open with several different musical forms. Actually its allegro