a.

1. 不潔的，骯髒的
   unclean water

   不乾淨的水

2. 不貞潔；不純潔；猥褻的；邪惡的
   In ancient times lepers were thought unclean.

   在古時候痲瘋病人被視為邪惡的。

3. （宗教儀式上）不潔淨的

adj.

1. dirty.
2. immoral.
3. ritually impure and unfit for use or consumption.
   ▸(in biblical use, of a spirit) evil.