乱
Pinyin: luàn
messy; chaotic
Example sentence
房间太乱了，收拾一下。
Fángjiān tài luàn le, shōushi yíxià.
The room is a mess — tidy it up.
What 乱 means
乱 (luàn) is a Chinese word meaning “messy; chaotic”. It belongs to the Describing Words topic and appears at HSK 4, so it is one of the words worth learning early when you study Chinese.