1 to become bad or be slowly destroyed 腐朽；腐烂: the decaying carcass of a dead sheep一头死羊的腐烂尸体 [SYN] rot 同义词为rot
2 to become weaker or less powerful 衰落；衰退: His business empire began to decay.他的商业王国开始衰落。 ➔decayedadja decayed tooth 蛀牙
decay²
/dɪˈkeɪ ||; dɪˈke/noun [U] the process or state of being slowly destroyed 腐朽；腐烂: tooth decay蛀牙The old farm was in a terrible state of decay.这旧农场已经一片荒芜。