Elatedness is a feeling of extreme happiness or joy, and its antonyms include depression, sadness, unhappiness, and dejection. Depression is a feeling of sadness or hopelessness that can make you lose interest in things that once made you happy. Sadness is a deeper and more intense form of emotion that can leave you feeling completely overwhelmed. Unhappiness is a state of discontent or dissatisfaction, while dejection is a feeling of low spirits and despondency. Overall, the antonyms for elatedness describe feelings of negativity and despair, which are the opposite of what one feels when they are elated.