滅亡
めつぼう · metsubou · JLPT N1 · noun
downfall
🏚️ metsu = ruin/extinguish, bou = country/nation: a nation extinguished, its downfall
滅 (metsu) means to extinguish or perish; 亡 (bou) means to die out or fall. Together they name a total collapse or destruction.