useless trivia: What Word Means: To Decrease Or Waste Away?

Questions

(It.) - A popular and light Italian strophic song for several voices, with the melody on top, flourishing around 1500. Particularly heard in aristocratic circles.?

- (1) (Lat.) A canon in the 15th and 16th centuries. (2) (It.) A fugue.?

- Describes a section of a composition in fugal style which is not actually a fugue.?

(Ger.) - Fugue.?

(It.) - Short fugue.?