1. superlative form of unhappy; most sad, distressed, or dissatisfied
Usage: superlative form

Examples

• She was the unhappiest person at the party.
• This was the unhappiest period of his life.
• The unhappiest customers complained loudly about the service.
• He looked unhappiest when discussing his failed business.
• The unhappiest children were those who felt left out.
• That was the unhappiest ending to a movie I’ve ever seen.