This is the 4303rd most frequent Japanese word.
凄い
Amazing; incredible; awesome.
In this sentence, "凄い" is used as an intensifier to emphasize the degree of entertainment the speaker felt about the movie.
この映画は凄い面白かった。
This movie was immensely entertaining.
Here, "凄い" is used to denote a positive astonishment toward the advanced construction from a technical perspective.
あの橋の建築技術は本当に凄いですね。
The architectural technique of that bridge is truly amazing.
In this usage, "凄い" describes the speaker's perception of someone's outstanding talent.