Depressive (adjective)

1. Characterized by or suffering from depression.
2. Causing or tending to cause depression.

Origin:

From latin depressus, past participle of deprimere to press down, from de- + premere to press.

Examples:

1. She has been diagnosed with major depressive disorder.
2. He has a depressive personality and always sees the negative side.
3. The depressive mood of the patient improved after treatment.
4. The depressive symptoms became severe during winter.
5. The depressive thoughts were overwhelming at times.