Hadst done with is an old English phrase which means to finish or to be done with something. The antonyms for this word would be to start, begin, or initiate. These words indicate the opposite of being done or finishing something. They convey the idea of commencing an action or activity. Other antonyms for hadst done with could include to continue, to prolong, or to maintain. These words signify the idea of continuing to do something instead of stopping or finishing it. Overall, the antonyms for hadst done with encompass a variety of different ideas related to starting, continuing, and maintaining an activity or action.