This is the 5340th most frequent Japanese word.
ll
It seems "ll" is not a Japanese word. Could you clarify or provide the correct term?
This sentence uses '楽しい' ('fun' or 'enjoyable') in its past tense ('楽しかった'), describing an enjoyable experience.
昨日は楽しかった。
Yesterday was fun.
Here, '興味深い' ('intriguing' or 'interesting') conveys the characteristic of the story.
その物語は興味深い。
That story is intriguing.
In this example, '難しい' ('difficult') is used to express a potential challenge in the math class.