風習
ふうしゅう · fuushuu · JLPT N1 · noun
custom
風 = wind, 習 = practice: customs are what a community keeps practicing, like a wind that blows through every generation
Compound: 風 (wind, style, manner) + 習 (practice, habit). A custom is a habit a whole group keeps repeating, passed on like a breeze moving through the community.