tristezaEtymologyBorrowed from Portuguese tristeza (“sadness”), referring to the devastation it caused in South America in the 1930s.tristeza means A damaging viral disease of citrus plants, caused by Closterovirus. Lexicurio rates it Sui generis — a strength score of 92 out of 100.nounA damaging viral disease of citrus plants, caused by Closterovirus.