無鉄砲

(1)marked by defiant disregard for danger or consequences; "foolhardy enough to try to seize the gun from the hijacker"; "became the fiercest and most reckless of partisans"-Macaulay; "a reckless driver"; "a rash attempt to climb Mount Everest"

(2)危険または結果の挑戦的な軽視によって特徴づけられる

(3)characterized by careless unconcern; "the heedless generosity and the spasmodic extravagance of persons used to large fortunes"- Edith Wharton; "reckless squandering of public funds"

(4)慎重さを欠いた無関心を特徴とする

(1)