stagnate
US
UK stagnate vi: (water: go stale)
SC （水）不流动 shuǐ bù liú dòng
SC 郁滞 shuǐ bù liú dòng，yù zhì
SC 成为死水 shuǐ bù liú dòng，chéng wéi sǐ shuǐ
The water will stagnate quickly if it does not flow again soon.
stagnate vi: figurative (be inactive) (比喻)
SC 停滞，不发展 tíng zhì，bù fā zhǎn
TC 停滯
TC 停滯
The band stagnated after they released their third album.
stagnate vi: figurative (become dull) (比喻)
SC 变得死气沉沉 biàn de sǐ qì chén chén
I used to enjoy this show, but it stagnated after the second season.