imprudent -
not prudent or wise; "very imprudent of her mother to encourage her in such silly romantic ideas"; "would be imprudent for a noneconomist to talk about the details of economic policy"- A.M.Schlesinger
prudent careful and sensible; marked by sound judgment; "a prudent manager"; "prudent rulers"; "prudent hesitation"; "more prudent to hide than to fight"
careless effortless and unstudied; "an impression of careless elegance"; "danced with careless grace"
foolish devoid of good sense or judgment; "foolish remarks"; "a foolish decision"
improvident not provident; not providing for the future