This is the 519th most frequent Chinese word.
深刻
Profound; deep.
In this sentence, '深刻' (deep/profound) is used to describe the strong and lasting nature of the impression ('印象') that the speech made.
他的演讲给我留下了深刻的印象。
His speech left a deep impression on me.
In this case, '深刻' clarifies the nature of the question, indicating that it is meaningful and thought-provoking.
他提出了一个深刻的问题，值得我们仔细思考。
He raised a profound question that is worth our careful consideration.
Here, '深刻' is employed to qualify the depiction ('描绘') in the movie, emphasizing its insightful and thorough nature.