'dizzy' originates from Old English, specifically the word 'dysig', where the root meant 'foolish, stupefied'.

'dizzy' changed from the Middle English word 'disy' (also spelled 'dizey' or 'disey') and eventually became the modern English word 'dizzy'.

Initially, it meant 'foolish' or 'stupid', but over time it evolved into its current meaning of 'feeling unsteady or lightheaded' (and related figurative senses).