giddy: [OE] Like enthusiastic, the etymological meaning of giddy is ‘possessed by a god’. Its distant ancestor was a prehistoric Germanic adjective *guthigaz, which was derived from *gutham ‘god’. This produced Old English gidig, which meant ‘insane’ or ‘stupid’. It was not until the 16th century that it acquired its main present-day meaning, ‘dizzy’. => god
