Hiraeth (pronounced [hiraɪ̯θ]) is a Welsh word which means 'nostalgia', or, more commonly, 'homesickness'.
Many Welsh people claim 'hiraeth' is a word which cannot be translated, meaning more than solely "missing something" or "missing home." To some, it implies the meaning of missing a time, an era, or a person. It is associated with the bittersweet memory of missing something or someone, while being grateful of that/ their existence.
Hiraeth bears considerable similarities with the Portuguese concept of saudade (a key theme in Fado music), Galicianmorriña, Romaniandor, Russiantoska (тоска), GermanSehnsucht and Ethiopiantizita (ትዝታ).