adjective
- not active enough; functioning below normal levels
Usage: often used in medical contexts
Examples
- The doctor diagnosed her with an underactive thyroid gland.
- His underactive metabolism made it difficult to lose weight.
- The underactive immune system left him vulnerable to infections.
- Children with underactive attention systems may appear daydreamy.
- The medication helped stimulate her underactive digestive system.
- An underactive bladder can cause urinary retention problems.