WRONG:

WAX

An unusual use of the word “wax” is “to change manner of speaking,“ as in “she waxed eloquent on the charms of New Jersey” or “he waxed poetic on virtues of tube amplifiers.” These expressions mean that she became eloquent and he became poetic. It is an error to say instead “she waxed eloquently” or “ he waxed poetically.”

List of errors