[W, bogy, hobgoblin, ghost, spectre].
Welsh supernatural creature, a solitary fairy or ghost, who may be helpful, mischievous, or awesome for the household. The bwci expects food, such as bread and bowls of milk, to be left for him; he can be vengeful to those who neglect him or tamper with his offerings. The bwci is often thought identical with the pwca, although the latter spelling usually signals the character's friskier personality. One bwci who teases a farm maiden has the secret name of gwarwyn a throt. See also BUCCA; BWBACH; BWGAN.