useless trivia: What Word Means: A First Name - An Evergreen?

Questions

- Properly, music to be performed during the action of a play. However, the term also includes overtures and interludes. ?

(It.) - Incisive.?

- A modernistic principal since 1945 of leaving elements of performance to pure chance (see aleatoric music) or letting performers decide when to play certain passages. Berio, Cage and Stockhausen used this concept in their compositions.?

- A neverending canon popularly known as a round (e.g. Three Blind Mice).?

(It.) - English.?