What is another word for most irreflective?
Pronunciation: [mˈə͡ʊst ɪɹɪflˈɛktɪv] (IPA) 
The phrase "most irreflective" describes someone who acts without thinking or considering the consequences. Synonyms for this phrase might include "reckless," "impulsive," "thoughtless," "careless," or "heedless." Other options might include "rash," "impetuous," "hasty," "foolhardy," "brash," or "unthinking." Alternatively, you could describe someone who is "unaware," "unconscious," "unmindful," or "unobservant" of their actions or surroundings. Overall, there are many different words you can use to convey the idea of acting without careful consideration or reflection, each with their own shades of meaning and connotations.
