c. 1300, "causing misfortune or trouble (to oneself or others)," from un- (1) "not" + happy. Meaning "unfortunate, unlucky" is recorded from late 14c.; sense of "miserable, wretched" is recorded from late 14c. (originally via misfortune or mishap).
雙語(yǔ)例句
1. The affixes " un - " and " - less " are often used make negative words, such as unhappy or careless.