Improvidentially is an adverb that describes an action or event occurring without foresight or prudence, resulting in unforeseen consequences. Several synonyms exist to portray this lack of careful planning or consideration. Firstly, "recklessly" conveys a sense of careless behavior or disregard for potential outcomes. Additionally, "haphazardly" suggests an action taken without organization or purpose, leading to unintended outcomes. Another synonym is "heedlessly", illustrating an absence of caution or mindfulness. Moreover, "thoughtlessly" depicts an action undertaken without careful consideration or attention to long-term effects. These synonyms effectively capture the essence of improvidentially, allowing for a nuanced understanding of actions taken impulsively or without future implications in mind.