This is the 5515th most frequent Japanese word.
おもしろく
"おもしろく" means "interestingly" or "amusingly."
In this sentence, 'おもしろかった' describes the movie, conveying that it was entertaining or captivating.
その映画はおもしろかったです。
That movie was interesting.
Here, 'おもしろく' modifies the verb '話しました', showing the manner in which he spoke as being engaging or entertaining.
彼はおもしろく話しました。
He spoke interestingly.
In this example, 'おもしろく' connects to the verb '感じる', indicating the sense or feeling of something being interesting at certain times.