A member of an indigenous people of Hainan Island in China, or relating to this ethnic group.
From Hainan (the island's name, from Chinese hai 'sea' + nan 'south') + -ai (suffix indicating ethnicity or group membership). The word identifies indigenous populations of this southern Chinese island.
The Hainai and related Hainan peoples developed unique boat-building and fishing technologies adapted to tropical seas—evidence that isolated island communities independently innovate sophisticated solutions to environmental challenges.
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