Assumptively is a term that means to make assumptions without careful consideration or evidence. Synonyms for this term include presumptuous, inconsiderate, imprudent, thoughtless, and impulsive. Other related words are hasty, rash, and reckless. When making assumptions, it is important to tread carefully and consider all available information before jumping to conclusions. By doing so, one can avoid the negative consequences that come with acting on incomplete or biased information. In summary, being assumptive can lead to problematic outcomes while being reflective can lead to a more measured and informed approach.