Kiwi comes from Maori. It’s an onomatopoeic word that imitates the call of the Kiwi bird. (Some linguists disagree. I’m not gonna get into that.) It has three basic meanings.
The Kiwi bird is a type of ratite – a large, flightless bird. They’re related to ostriches, emus, rheas, and cassowaries. (They’re also related to moas, which are extinct.)
Kiwis are endemic to New Zealand. There are five species of kiwi, all of which are endangered. Kiwis are approximately the size of chickens, are mostly nocturnal, and lay the largest eggs in proportion to their body size of any bird in the world.
The Kiwifruit is another name for the Chinese gooseberry. The word kiwifruit was adopted for commercial reasons in the 1950’s.
The kiwi is a type of berry, and is a good source of potassium and vitamin C. There’s the standard kiwi (the one that’s always paired w/ strawberries for whatever reason), and the golden kiwi, which has an edible skin.
Finally, Kiwi is a colloquial term for a New Zealander. It’s used as a noun and an adjective.