words that don't exist in the english dictionary...

- l’esprit d’escalier (French) The feeling you get after leaving a conversation, when you think of all the things you should have said.

- forelsket (Norweigan) The euphoria you experience when you are first falling in love.

- saudade (Portuguese, Galician) The feeling one gets when realizing something one once had is lost and can never be had again.

via