This is the 14996th most frequent Russian word.
подрывает
"Undermines" or "destroys."
The verb "подрывает" in this sentence is used metaphorically to indicate a reduction or weakening of trust, similar to 'undermining' in English.
Эта ситуация подрывает его доверие к друзьям.
This situation undermines his trust in friends.
Here, "подрывает" refers figuratively to challenging or weakening the established norms or foundations of society.
Он подрывает устои общества своим поведением.
He undermines the foundations of society with his behavior.
In this context, "подрывает" is used literally to describe the act of an explosion causing destruction.