The term 'handle wrongly' can be summarized by two crossword solutions: MISDO (5 letters) and MISUSE (6 letters). Both words refer to the act of treating something in an improper or incorrect manner. MISDO is a verb meaning to do something wrong or to commit a misdeed, while MISUSE is a verb meaning to use something incorrectly or inappropriately. Both words imply that something has been handled wrongly, either through an action or through an inappropriate use.