Old English carleas "free from anxiety; unconcerned," from care (n.) + -less; a compound probably from Proto-Germanic. Original senses extinct by mid-17c.; main modern meaning "not paying attention, inattentive, not taking due care" is first recorded 1560s (in carelessly).
例文
1. The affexes "un-"and "-less "are often used make negative words,such as unhappy or careless .
接辞un-および-lessは、unhappyや careless .
2.They could not afford to spoil those maps by careless colouring.
色を塗っている間にうっかり地図を壊してしまったら、彼らは負担できない。
3.That shows a fairly careless attitude to clothes,doesn 't it?
それはこの人が身なりにこだわらないことを示しているのではないでしょうか。
4.Mr Clarke had pleaded guilty to causing death by careless driving.