Plateauing

refers to the point where progress, growth, or activity stops increasing and levels off, remaining stable after a period of rapid development or improvement. It represents a "standstill" in performance, often seen in weight loss, career progression, or sales figures. 

Usage Examples

Fitness: "I had been losing a pound a week, but my weight loss has recently plateaued".

Career: "After five years in the same role, he felt his career growth was plateauing".

Business: "Company profits began to plateau out after a rapid surge in sales".

General: "The pandemic’s death rate has plateaued at around 540 a year"