低下 /teika/ NounEnglishdeclineFrançaisdécliner / péricliterExample世間の関心の[衰退 (しんすい/しんしゅく/しんしゅく) — of: There has been a sharp decline in public interest.]There has been a sharp decline in public interest.「関心」は「衰退」と非常に相性が良いです。