Nikui にくい

Adjective meaning: hard/difficult (to do), cannot (do) easily. 

1. After conjunctive form of verb 

箸は使いにくいですね。 

Hashi wa tsukainikui desu ne. 

Chopsticks are hard to use, aren’t they? 

彼女とは話しにくいです。 

Kanojo to wa hanashinikui desu. 

She is difficult to talk with. 

(follows the subject it describes) 

覚えにくい漢字がたくさんあります。 

Oboenikui kanji ga takusan arimasu. 

There are a lot of Chinese characters that are difficult to learn. 

(precedes the object it modifies)

-> See also: yasui