户枢不蠹 (戶樞不蠹) hù shū bù dù

hù shū bù dù set phrase a door hinge never becomes worm-eaten; constant activity prevents decay
Domain: Idiom 成语
Notes: (CC-CEDICT '戶樞不蠹')

Contained in

• 流水不腐，户枢不蠹(流水不腐，戶樞不蠹) flowing water does not rot, nor a door-hinge rust; constant activity prevents decay