Hyrn, n. a hough, holme
Hyrwym, a. easily binding
Hyrwysg, a. of a free career
Hys, n. snarl or knarl
Hysathr, a. easily trodden
Hysbys, a. evident, manifest
Hysbysai, n. index
Hysbysiad, n. advertisement; a declaration
Hysbysrwydd, n. manifestation, notice
Hysbysu, n. to advertise, to inform, to acquaint