Misc: In medical descriptions, what is the meaning of the term "chronic"?

Questions

(Fr., 'cunning') - In opera or operetta, this often describes a soprano singing the role of a shrewd, rather pert servant girl.?

(Fr.) - Sustained and flowing.?

(It.) - Smooth.?

(It.) - Clearly articulated. This term is used in string playing for a light, staccato touch created by playing with the middle of the bow and a loose wrist.?

(Ger.) - A light tenor voice in opera.?