Classical noun form of 難し (かたし, 'difficult'). Used in old or literary contexts; in modern Japanese, 難しさ or 困難 are preferred. Often contrasted with 易き (やすき, 'ease').
Antonyms: 易き
It is wisdom to turn difficulty into ease.
In classical texts, '難き' and '易き' are often contrasted.
easiness; simpleness
The substantivized classical attributive form 難き of the adjective 難し “difficult.” It literally means “that which is difficult.”