台Taivo A Taiwan Mandarin dictionary

綠

lǜ

ㄌㄩˋ

Simplified 绿

1green
2(slang) (derived from 綠帽子|绿帽子[lu:4 mao4 zi5]) to cheat on (one's spouse or boyfriend or girlfriend)

Example

是綠色。

shì lǜsè

It is green.

Keep 綠 and it comes back until you know it.