What's Non-Concatenative Morphology?

Don't make a language with morphology that's entirely not concatenative, especially not languages entirely the triconscendental roots because there are prefixes and suffixes. You learn a normal Arabic verb and there's not a whole lot non-concantative going on. There's some, but it's not nearly as much as you might think. Most of the weirdness of the usual conjugations of Arabic and especially Hebrew verbs are just a little bit of non-concillative stuff determining the root.