Hyfyr, n. a gelt goat
Hyff, n. a drive; a drift
Hyffagl, a. apt to flame
Hyffawd, a. aptly prospering
Hyffiad, n. a forcing on
Hyffiaw, v. to drift
Hyfflam, a. apt to flame
Hyffo, a. capable of retreating
Hyffordd, a. apt to make way
Hyfforddi, v. to direct