i-adjective
poor; not good; dull; sluggish
Used to describe performance, results, business, or condition that is below expectations. Often appears in set phrases like 成績が振るわない or 売り上げが振るわない.
今月の売り上げは振るわない。
This month's sales are poor.
試験の成績が振るわなかった。
My exam results were not good.