Bo"gle (?), n. [Scot. and North Eng. bogle, bogill, bugill, specter; as a verb, to terrify, fr. W. bwgwl threatening, fear, bwg, bwgan, specter, hobgoblin. Cf. Bug.] A goblin; a specter; a frightful phantom; a bogy; a bugbear. [Written also boggle.]