Meaning

noun East Indian tree with thick leathery leaves and edible fruit

noun two- to three-inch tropical fruit with juicy flesh suggestive of both peaches and pineapples

originBorrowed from Dutch mangosteen (“mangosteen”), from Malay manggustan ~ manggista ~ manggistan fusing manggis hutan “jungle manggis” applied to Garcinia hombroniana or G. malaccensis; manggis is a generic word applied to other related garcinias like above and Garcinia penangiana (manggis burung). Not related to mango, though this may have influenced the spelling and pronunciation.

Etymology from Wiktionary, CC BY-SA 3.0