1. to stop developing, growing, or making progress
Usage: third person singular present tense of ‘stagnate’
2. to become motionless or still, especially of water or air
Usage: literal sense; third person singular present tense of ‘stagnate’

Examples

• The economy stagnates when there is little investment.
• Her career stagnates because she refuses to learn new skills.
• The water stagnates in the pond during summer.
• Without fresh ideas, the company stagnates.
• Air stagnates in rooms without proper ventilation.
• The student’s progress stagnates without regular practice.