What is the term for the inability to voluntarily control urination or defecation?

The term for the inability to voluntarily control urination or defecation is incontinence. Incontinence encompasses a range of issues where an individual experiences a loss of bladder or bowel control, leading to unintentional leakage. This condition can arise due to various factors including neurological disorders, muscle weakness, or other medical conditions that affect the body's ability to regulate these functions.

Other terms provided in the choices focus on different aspects of urinary or bowel health. Retention refers to the inability to fully empty the bladder or bowels. Constipation is characterized by infrequent or difficult bowel movements. Hypercontinence suggests an excessive control, which is not relevant in the context of loss of voluntary control. Therefore, incontinence is the most accurate term for describing a lack of control over urination or defecation.