flatline

the patient's heart rate began to flatline during the procedure.

after the shocking news, his emotions seemed to flatline.

her enthusiasm for the project started to flatline after several setbacks.

the stock prices flatlined for weeks before finally recovering.

his career seemed to flatline after the scandal.

the team's performance flatlined, leading to a disappointing season.

sales flatlined during the economic downturn.

after the initial excitement, the project’s progress flatlined.

the athlete's performance flatlined after years of competing.

interest in the product flatlined, prompting a new marketing strategy.