unhealthy

Eating fast food every day is an unhealthy habit that can lead to many problems.

(Chinese) 每天吃快餐是一个不健康的习惯，会导致很多问题。

The plants in the corner look unhealthy because they don't get enough sunlight.

(Chinese) 角落里的植物看起来不健康，因为它们没有得到足够的阳光。