"Wast handy" is an uncommon term used to describe something that is useless or of no practical value. There are several synonyms that can be used in place of this term including worthless, futile, ineffectual, useless, and ineffective.
Words like futile and ineffectual suggest that the action or item in question is not only useless, but also without any chance of success. Useless and ineffective, on the other hand, imply that while the item may have the potential to be useful, it fails to meet its intended purpose.
In all cases, these synonyms suggest that whatever is being described serves no practical purpose and should be avoided. It is important to use clear and concise language when describing objects or actions to ensure effective communication with others.