Air [Fr], Air [E], Ayre [E], Aire, Aria [I]—Song. Traditionally indicates a piece of melodic or vocal nature as opposed to one of dance-like character (i.e. in form or rhythm). An aria typically refers to a formalized song within an opera context for one or more voice
allegro [I]—fast, lively tempo. From the Italian word for cheerful or gay.
chamber music, Kammermusik [G], musique de chambre [F], musica da camera [I], musica cameralis [L]—"Classical Music" for a small ensemble, generally 8 or fewer players with a canonical emphasis on 3-6 players. explore
con [I,S]—with
moto, con moto, di moto—motion, with motion. Somewhat more lively than its context would suggest, e.g. "andante con moto", a little more lively than andante
quartet, quatuor [F], quartett [G], quartetto [I], cuarteto [S]—ensemble or work for four players the most important examples being the string quartet and the piano quartet
string quartet, Streichquartett [G], quatuor à cordes [F], quartetto d'archi [I], quartetto di cordi [I], cuarteto de cuerda [S], vonósnégyes [H]—ensemble or a work written for that ensemble comprising 2 violins, viola, and cello. This is one of the essential genres/forms/ensembles of chamber music and arguably a critical "core" of "classical" music. Explore the string quartet | wiki