adj mischievous; wanton; wicked.
2. unhappy ·adj marked by infelicity; evil; calamitous; as, an unhappy day.
3. unhappy ·adj not happy or fortunate; unfortunate; unlucky; as, affairs have taken an unhappy turn.
4. unhappy ·adj in a degree miserable or wretched; not happy; sad; sorrowful; as, children render their parents unhappy by misconduct.