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Looks like the fruit is also know as Keraya: http://ji2nee2kerala.weebly.com/medicinal-plants.htmlFound a vid too: https://www.youtube.com/watch?v=DW5ODrVAYQM
May be Ixora coccineaThe plant is shrub so it can not belong to Baccaurea spNot possible to be a member of Meliaceae/SapindaceaeRoy