allegretto—moderately quick tempo. slower than allegro but faster than andante
allegro—fast, lively tempo
anima [I]—soul, spirit, life, feeling
chamber music, Kammermusik [G], Musique de chambre [F], Musica da camera [I]—"Classical Music" for a small ensemble, generally 8 or fewer players with a canonical emphasis on 3-6 players
duo, duet, dueto [S], duetto [I], duett [G]—a work for two instruments; the ensemble itself
larghetto—slow, but a bit faster than largo
poco, un poco—a little bit, e.g. "andante un poco moto" is andante with a little more motion than typical
quasi—almost, almost like, as if
rubato—to artfully distort the rhythmic flow for expressive emphasis by slowing (speeding) the tempo around certain points of articulation. Meaning "robbed" time suggesting that a slowing must be balanced by a speeding up
sonata, sonate, suonato—a complicated term. Originally, "sounded" rather than "sung" (sonar vs. cantar), e.g. instrumental music. According to historical period, sonata began to imply a formal plan of movements as well as the structure within a single movement, e.g. sonata form. In general usage as a work title, it designates a multi-movement piece for solo or duo instruments with one of the instruments enjoying a feature role.
troppo [I], non troppo, trop [F]—too, too much. non troppo means "not too much". e.g. "Allegro ma non troppo" means fast, but not too much
violin sonata—a multi-movement work for violin and keyboard (or continuo) though there are sonatas for solo violin as well as sonatas in a single movement. While the violin would seem to be the featured instrument, many sonatas starting with the classical period find the piano to be an equal partner in the sense of a chamber work for two players.
with thinking heart and feeling mind, I'll embody your muse, thy soul divine