Final answer:
The term for a condition with numerous hypomanic/depressive symptoms not meeting full criteria for hypomanic or major depressive episodes over at least 2 years is cyclothymic disorder.
Step-by-step explanation:
The condition you are describing is known as cyclothymic disorder. This mood disorder is characterized by chronic, fluctuating mood disturbances involving numerous periods of hypomanic symptoms and depressive symptoms. These symptoms are less severe than those required for a diagnosis of bipolar disorder and do not meet the criteria for a hypomanic episode or a major depressive episode. Specifically, to be diagnosed with cyclothymic disorder, a person must experience these symptoms for at least two years. The mood disturbances in cyclothymic disorder can still significantly impact a person's day-to-day functioning and quality of life, and it may require treatment to manage the symptoms effectively.