遺跡
いせき · iseki · JLPT N1 · noun
ruin
🏛️ 遺 (remains, leave behind) + 跡 (trace, footprint) = traces left behind by past civilizations
遺 means remains or bequeathed, and 跡 means trail or mark. Together they name what the past left behind: historic ruins, sites where old buildings have crumbled.