accustomed:

adj. 习惯的；通常的；独有的

v. 使习惯于（accustom的过去分词）

These fish have lived in the deep sea for a long time and are accustomed to darkness.

这些鱼长期生活在深海中，习惯了黑暗。

habitual:

adj. 习惯的；惯常的；习以为常的

The monk's habitual residence is the temple on the top of the hill.

这位和尚的常驻地是山顶上的寺庙。