Three consonants hold one motion: crossing over. Something moves from this side to that side. Push that motion through time and it becomes the past (עָבָר), what has already crossed by. Push it through space and it becomes a passage, a transfer, even traffic. The same root names the people who once crossed a river: the Hebrews (עִבְרִי), the ones from the other side. None of the words below are memorized separately; they are the same crossing, seen from a different bank. 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.
The pa'al is the plain crossing; the hif'il is causative, you don't cross, you make something cross (transfer it). The pi'el here drifts semantically: "to make pregnant" is the body crossing a threshold into a new state, and it ties straight to עֻבָּר, the fetus. Nif'al, pu'al, huf'al and hitpa'el exist in the system but are not lexicalized as everyday verbs for this root.
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.