Acronym Soup: HACB?

Questions

(Fr.) - Beat.?

. - Abbreviation of (1) tenor and (2) tenuto.?

(It.) - Sustaining.?

(It.) - Tenderly.?

- (1) Adult male voice between bass and alto; (2) Part above the bass in a four part vocal composition in SATB (soprano, alto, tenor, bass); (3) In sacred polyphonic music before 1450, this was the lowest melodic part upon which the composition was based; (4) A prefix to an instrument (e.g. tenor saxophone indicating the size between alto and bass).?