Meaning of “stagnate” - Learner’s Dictionary

stagnate

verb [ I ] uk /stæɡˈneɪt/ us /ˈstæɡneɪt/

to stay the same and not grow or develop:

He expects the economy to stagnate and unemployment to rise.
stagnation noun [ U ] us uk /stæɡˈneɪʃən/

(Definition of “stagnate” from the Cambridge Learner’s Dictionary © Cambridge University Press)