A semantic change toward a more positive connotation in the meaning of a word or morpheme; for example, the English word nice, which meant "foolish" in Middle English, now means kind or pleasant. Other examples of amelioration include the elevation of the Latin word casa ‘hut, cottage' to Modern Spanish casa ‘house,' and the change in meaning of Old English cniht ‘boy, servant' to Modern English knight (Campbell p.63).