stagnate
v[I]
1 be or become stagnant(1) 不流動; 成為死水.
2 (fig 比喻) be or become dull or unsuccessful because of lack of activity, development, opportunity, etc 停滯; 變遲鈍; 不景氣; 不發展
a stagnating industry 不景氣的工業
I feel I'm stagnating in this job. 我覺得我干這份工作沒什麼前途.
His mind has stagnated since his retirement. 他退休後頭腦遲鈍了.