This is the 10304th most frequent Japanese word.
風向き
"Wind direction."
Here, '風向き' refers literally to the direction of the wind.
風向きが変わった。
The wind direction has changed.
In this sentence, '風向き' is used metaphorically to indicate the trend or tendency of a situation.
情勢の風向きが悪くなってきているようだ。
It seems that the situation's trend is worsening.
Here, '風向き' metaphorically refers to sensing social or situational trends.