fruit: what something yields, whether the produce of a plant or the result a life, action, or work brings forth.
At its root this word names the produce a plant gives: the figs on a fig tree, the grapes of a vineyard, the grain a field puts up. From there it stretches by a natural picture into everything else that bears fruit. Just as a tree shows what it is by what grows on it, so a person, a deed, or a labor shows what it is by what it produces. The whole range hangs on that one image, so the word never really changes its meaning; it only changes what is doing the producing.
That single picture is why the New Testament can move so easily from orchards to character to offspring without explanation. John the Baptist tells people to bear fruit worthy of repentance, Jesus says a tree is known by its fruit and so is a person, Paul lists the fruit of the Spirit, and Luke calls a child the fruit of the womb. None of these is a separate dictionary word; each is the same harvest picture pointed at something new.
So the senses below are shades of one meaning, not rival meanings. The literal produce of the ground is the base. The result a life or deed brings forth, the gain a work returns, and the offspring a body produces are all the same word saying that you can tell what a thing is by what comes out of it.