c. 1300, "to make dark;" late 14c., "to become dark," from dark (adj.) + -en (1). The more usual verb in Middle English was simply dark, as it is in Chaucer and Shakespeare, and darken did not predominate until 17c. The Anglo-Saxons also had a verb sweorcan meaning "to grow dark." To darken someone's door (usually with a negative) is attested from 1729.
权威例句
1. Nothing was going to darken his mood today.
今天什么都不会影响到他的心情。
2. The sky began to darken as the storm approached.
暴风雨来临时天空变得黑沉沉的。
3. Please darken the blue paint with black paint.
请在蓝漆里掺上点黑漆.
4. Go ! And never darken my door again!
滾,不许再跨进我的门槛!
5. " Clouds darken with darkness of rain, Streams pale with pallor of mist . "