Trydydd, a. third
Tryrdd, n. what is through
Tryf, n. what is pervasive
Tryfal, n. a triangle
Tryfalu, v. to form a triangle
Tryfer, n. a harpoon, a spear
Tryferiad, n. a harpooning
Tryferu, v. to harpoon
Tryfesur, n. a diameter
Tryfol, n. what is all belly