Misc: What is the traditional theatrical greeting before a performance to wish 'good luck'?

Questions

- A prefix to a note indicating the pitch is to be lowered by two semitones. ?

- Prefix attached to note indicating pitch to be raised by two semitones.?

(ment) (Fr.) - Sweet (sweetly), gentle (gently).?

- The downward movement of the conductor' s baton or hand indicating the first beat of the bar. The term can also mean the first beat of the bar.?

(It.) - Two strings. In piano music this occasionally indicates the release of the soft pedal (same as Tre Corde).?