This is the 5774th most frequent Japanese word.
なびか
The word "なびか" does not have a clear meaning as a standalone term in Japanese. It might be a fragment or require context for interpretation.
Here, 'なびいた' (nabiita) indicates the motion of the flag being influenced and swayed by the wind.
旗が風になびいた。
The flag fluttered in the wind.
In this sentence, 'なびいた' (nabiita) signifies that her heart was profoundly affected or inclined due to admiration for his kindness.
彼女は彼の優しさに心がなびいた。
Her heart was moved by his kindness.
The phrase 'なびかせます' (nabikasemasu) explains the act of people's emotions being swayed or attracted by appealing music.