godan verb (-mu), intransitive verb
be sluggish; make little progress; fail to grow as expected
Describes growth, improvement, or progress that has stalled or is not meeting expectations. Often used for economic indicators, sales, skills, or personal development.
売り上げが伸び悩んでいる。
Sales are sluggish.
彼の成績は最近伸び悩んでいる
His grades have been failing to improve lately.
景気回復が伸び悩んでいる。
The economic recovery is making little progress.