"Descant" is a word in ENGLISH

To comment freely; to discourse with fullness and
particularity; to discourse at large.

Originally, a double song; a melody or counterpoint
sung above the plain song of the tenor; a variation of an air; a
variation by ornament of the main subject or plain song.

A discourse formed on its theme, like variations on a
musical air; a comment or comments.

The canto, cantus, or soprano voice; the treble.

To sing a variation or accomplishment.

The upper voice in part music.