This is the 14523rd most frequent Korean word.
물결에
"물결에" means "to the wave" or "in the wave" in English.
The word 물결에 in this sentence indicates a condition of immersion or surrounding within waves.
물결에 몸을 맡기며 호수에 떠다녔다.
I floated on the lake, surrendering to the waves.
Here, 물결에 metaphorically represents waves of emotion.
그의 이야기는 감정의 물결에 우리를 사로잡았다.
His story captivated us with a surge of emotion.
In this sentence, 물결에 refers literally to the waves as a surface interacting with sunlight.