rotten smell; smell of decay
Refers to the odor of decaying organic matter. Often used in descriptive or narrative contexts.
There's a rotten smell coming from the kitchen.
腐臭に気づいて冷蔵庫を調べた。
Noticing a smell of decay, I checked the refrigerator.
Compound of 腐 (ふ, 'rot') and 臭 (しゅう, 'smell'). The reading ふしゅう follows standard on'yomi.