ABC Wednesday-N for noni fruit

This is one of the common plants in Singapore, often seen especially in areas where kampongs (villages) used to be, and in the garden of many people's house. The tree have shiny leaves and will flower throughout the year, the flowers are tiny in white, it will
produce a multiple fruit that appears as an individual (like a pineapple). The fruit itself is ovoid and turns from green to a translucent white when fully ripe, with kind of odd smell. I was told the fruit can be cooked with curry, the seeds are edible when roasted. As written in a lot of article, the fruit contains many different nutrients and phytochemicals, were claimed that noni is the most important of the herbs used in medicine, however I am not the expert and only know the name of "noni juice." But I am curious why
Old Chinese people call this tree as "Dumb tree" in Hokkien, I am not sure where the name came from, any story behind it?

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