One body in one place: that is the whole idea of י־שׁ־ב. The simple verb is just to sit; but a person who sits stays, a person who stays lives somewhere, and a group that lives somewhere founds a town. So the same three letters slide from a chair, to a household, to a village, to a yeshiva, to a council meeting where everyone is literally seated. Watch the move: sitting becomes dwelling becomes settling the land. Every word here is verified against pealim, niqqud included.
The same root runs through the verb system. Each binyan is a voice: it bends the one idea into active, passive, causative or reciprocal. Tap to hear.
Notice the two-step ladder of agency. Pa'al = I sit. Hif'il = I make you sit (I seat you). Pi'el turns the staying into an action done to the land: settling it, populating it, and from there metaphorically settling a quarrel. The passives nif'al, pu'al and huf'al are not lexicalized as everyday verbs for this root, which is normal: not every root fills all seven binyanim.
Same root letters, different noun moulds (mishkalim). The mould tells you the function: who does it, the act of doing it, or the thing produced.
Strip the prefixes, suffixes and vowels. Three consonants remain, and the meaning lives there.