The phrase "hadst mind" is an archaic form of "had in mind" meaning to intend or have a specific intention. Antonyms for this phrase could include "uncertain," "unintended," "aimless," "undecided," "unplanned," or "ambiguous." These words indicate a lack of direction or a vague idea, in contrast to "hadst mind" which implies a clear objective. Expressions such as "flying blind," "winging it," or "making it up as you go along" would also be antonyms, as they suggest a lack of planning or consideration. In contrast, having a clear intention and purpose can lead to more successful outcomes and a sense of accomplishment.