blithe
/blaɪð/You use blithe to indicate that something is done casually, without serious or careful thought. 漫不经心的
adjective [原级] 愉快的;快乐无忧的
Acts of trespass and petty theft often grew out of the blithe disregard that boys had for private property. 擅自侵入和小偷小摸的行为经常出自于男孩子们对私有财物漫不经心的轻视态度。