Final answer:
Urinary retention is the term used to describe the inability to urinate fully. It can be caused by different factors and may result in the accumulation of urine in the bladder.
Step-by-step explanation:
The inability to urinate is termed urinary retention. This condition refers to the inability to empty the bladder fully, leading to the accumulation of urine. Urinary retention can be caused by various factors, such as bladder muscle weakness, blockage in the urinary tract, nerve problems, or certain medications.