Do you know ghouls from goblins and ghosts?
early 13c., "that which is vain, futile, or worthless," from Old French vanite, from Latin vanitatem (nominative vanitas) "emptiness, foolish pride," from vanus "empty, vain, idle" (see vain). Meaning "self-conceited" is attested from mid-14c. Vanity table is attested from 1936. Vanity Fair is from "Pilgrim's Progress" (1678).