1. to make something last longer; to extend the duration of something
Usage: third person singular present tense of ‘prolong’

Examples

• The medication prolongs the patient’s life expectancy.
• Heavy traffic prolongs our commute to work.
• She prolongs her vacation by taking extra days off.
• The rain prolongs the baseball game delay.
• This treatment prolongs the freshness of the flowers.
• He prolongs every conversation with unnecessary details.