Gloyn, n. a burning coal; a glow-worm
Gloyw, a. bright, transparent
Gloywdeg, a. brightly fair
Gloywder, n. clearness, brightness
Gloywddu, a. of bright black
Gloywedd, n. transparency
Gloywgain, a. brightly fair
Gloywgoch, a. of bright red
Gloywi, v. to clear, to brighten
Gloywiad, n. a brightening