1. carelessness

    粗忽な 〔不注意な〕careless;〔そそっかしい〕rash

    • 粗忽にも列車を乗り間違えた
    • I stupidly [carelessly] took the wrong train.
  1. 粗忽者a blunderer,《口》 a blunderbuss; a careless person