infeliz
/infeˈliθ/ · B1 · adj
unhappy
💔 in- (not) + feliz (happy) = not happy, like English in- in incorrect
Feliz comes from Latin felix, meaning lucky or happy. The same root is in English felicity and the name Felix. Add the negative in- and you get infeliz: unhappy, or unlucky. The final z sounds like th in thin in Spain.