Gwylfan, n. a sentry place
Gwyliad, n. vision: watching
Gwyliadur, n. a sentinel
Gwyliadwr, Gwyliwr, Gwylydd, n. a watchman
Gwyliadwraeth, n. the office or duty of a watchman; a watch
Gwyliadwrus, a. watchful
Gwylied, Gwylio, v. to watch
Gwyliedydd, n. a sentinel
Gwylmabsant, n. a parish wake
Gwylmabsanta, v. to keep wakes