adagio [It]—slow tempo, often implying a lyrical, poignant character
allegro—fast, lively tempo
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
grazioso [I], con grazia, gratioso, graziös [G], Mit Grazie—graceful, gracefully; easy
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.
sonatina [I], sonatine [F]—"little" sonata, typically shorter, less technically challenging, perhaps less "profound". Movements tend to minimize development sections.
vivace—brisk, lively tempo faster than allegro
with thinking heart and feeling mind, I'll embody your muse, thy soul divine