stagnate
/stægˈneɪt/verb
no obj.
1- (of water or air) cease to flow or move; become stagnant（水, 空气）不流动, 停滞; 变臭。
1.1
- figurative cease developing; become inactive or dull〈喻〉停止发展; 变得死气沉沉, 变呆滞：
teaching can easily stagnate into a set of routines
教育很容易固化为变一套陈规
as adj. stagnating stagnating consumer confidence.停滞不前的消费者信心。
派生词
stagnation
noun词源
mid 17th cent.: from Latin stagnant- 'settled as a still pool', from the verb stagnare, from stagnum 'pool'.