动词

1.

2. 难以看见（或发现）的;隐藏的
Hidden facts, feelings, activities, or problems are not easy to notice or discover.

3. （地方）隐秘的
A hidden place is difficult to find.

1. difficult to find

e.g. hidden valleys
a hidden cave
an obscure retreat

Synonym: obscure

2. designed to elude detection

e.g. a hidden room or place of concealment such as a priest hole
a secret passage
the secret compartment in the desk

Synonym: secret

3. not accessible to view

e.g. concealed (or hidden) damage
in stormy weather the stars are out of sight

Synonym: concealedout of sight