i-adjective
difficult to come; hard to come
Expresses that it is difficult for someone to come (to a place or event), often due to circumstances or obstacles. The pattern is verb stem + にくい.
雨がひどくて、友達が来にくいと言っていた。
My friend said it's hard to come because of the heavy rain.
駅から遠いので、この店は来にくい。
This shop is difficult to get to because it's far from the station.
来づらい emphasizes emotional or psychological difficulty in coming, while 来にくい is more about objective or physical difficulty.
来がたい is a more formal and literary expression meaning 'hard to come', often used in written language.
Compound of the verb 来る (kuru, 'to come') in its stem form 来 (ki) and the auxiliary adjective にくい (nikui, 'difficult to do'). The kanji spelling 来難い is an ateji usage.