颓 ⇒
颓废 tuífèi, [頹廢], decadent/dispirited/depressed/dejected
颓 tuí, [穨]/[頹]/[頽], variant of 頹|颓[tuí], to crumble/to collapse/to decline/to decay/decadent/dejecte...
颓丧 tuísàng, [頹喪], dejected/disheartened/listless
颓势 tuíshì, [頹勢], decline (in fortune)