allegro [I]—fast, lively tempo. From the Italian word for cheerful or gay.
andantino—faster than andante, slower than allegretto. Sometimes andantino is interpreted as the opposite: slower than andante
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
duo, duet, dueto [S], duetto [I], duett [G]—a work for two instruments; the ensemble itself
finale [I], final [F]—The final movement, sometimes explicitly titled thus
humoresca [I], humoresque [F], humoreske [G]—an instrumental piece with a humorous or fanciful character
moderato [I], moderamente, modéré [F], modérément [F]—moderately, at a moderate tempo, applying a touch of restraint to its related word(s), e.g. allegro moderato
movement, mouvement [F], movimento [I], Satz [G]—A generally self-contained, complete section or piece of music forming part of a large whole, typically separated from the other movements by silence and a break.
opus [L], opera[pl], Op., Opp, WoO, Op. posth—work, as in a work of art. For unique identification, publishers/composers often assign an "opus number", abbreviated as "Op." (e.g. Op. 1). A range of works by opus number, uses the plural "opp." (e.g. "Opp. 1-3"). A single opus number may refer to a collection of works (e.g. a set of quartets) giving rise to designations like "Op. 1, No. 4". For misc. works without opus numbers, "WoO" is often used (e.g."Without Opus"). Posthumously assigned numbers may use "Op. posth". Opus numbers may not precisely reflect chronology (publication vs. composition), can be erroneous, sparse or duplicative. Thus, the works of some historically important composers may use separate catalog numbers (e.g. Bach, Haydn, Schubert). See wiki
spirito, con spirito, spiritoso, spirituoso—Spirited, lively
suite—a set of instrumental pieces (movements) played together to create a larger whole. Suites tend towards collections of dances, frequently in the same key, preceded by a prelude, introduction or overture.