the.com/duku

means A small brownish tropical fruit (Lansium parasiticum) with a thin peel hiding sweet-tart segmented flesh, grown and loved across Southeast Asia.

from The word comes from Malay — 'duku' names the fruit directly, as part of a cluster of closely related fruits (duku, langsat, pulasan, duku-langsat hybrids) from the same tree species native to Southeast Asia. The name traveled into English simply by borrowing, the way most fruit names do when a fruit itself has no good foreign stand-in — there was no reason to translate what already had a perfectly good name where it grew.