v.(使)變紅；臉紅
His acne begins to redden and intensify in less that five minutes. 他痤瘡開始變紅,并加大在不到五分鐘。
The leaves turns yellow, the maples redden, so beautiful and so graceful! 樹葉黃了,楓葉紅了,煞是好看。
Humans redden when they are angry. 人類憤怒時會臉紅。
