suffix, i-adjective
difficult to ...; hard to ...
Attaches to the -masu stem of a verb to express that the action is difficult or hard to do. Often implies an inherent difficulty rather than a temporary inability.
この漢字は覚えにくい。
This kanji is hard to remember.
彼の説明は分かりにくかった。
His explanation was difficult to understand.
この靴は歩きにくい。
These shoes are hard to walk in.