Vーにくい/Vーやすい
The combination of 「V(stem)+にくい」 or 「V(stem)+やすい」 expresses the meaning of '(it's) hard/easy to do such and such'.
Examine the following examples.
Note that once -にくい or -やすい is attached to a verb, the whole part becomes an adjective. Thus, V-にくい/V-やすい form conjugates like adjectives.