難しかっ

難しかっ

"難しかっ" is the stem form of "難しかった," meaning "was difficult."

Used to describe the difficulty of the problem, '難しかっ' indicates past tense by adding 'かった' at the end.

この問題は難しかったです。

This problem was difficult.

'難しかっ' is used to express the past difficulty experienced when performing the action of cooking, combined with 'た' for past tense.

料理を作るのが難しかったから外食しました。

Since cooking was difficult, I ate out.

Here, '難しかっ' reflects the challenging nature of the mountain climbing, indicating past experience.

山登りは難しかったですが、とても楽しかったです。

Climbing the mountain was difficult, but it was very enjoyable.