sol-fa

v. i. [ imp. & p. p. Sol-faed p. pr. & vb. n. Sol-faing. ] [ It. solfa the gamut, from the syllables fa, sol. ] To sing the notes of the gamut, ascending or descending; as, do or ut, re, mi, fa, sol, la, si, do, or the same in reverse order. [ 1913 Webster ]

Yet can I neither solfe ne sing. Piers Plowman. [ 1913 Webster ]