Three consonants carry one idea: becoming pregnant, carrying something inside. The literal core is the body conceiving a child, and the family stays close to it: the verb to conceive, the noun pregnancy, the parent. One word stretches the image metaphorically: a situation "pregnant" with consequences. This is an old, biblical root, and its concrete and figurative senses both come straight from the same picture of something growing within. Every word 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.
This root lives almost entirely in pa'al, the simplest binyan, fitting its basic, bodily meaning. The third root letter is a weak ה, so the infinitive ends in ‑וֹת rather than the usual pattern. The other binyanim are not lexicalized; modern Hebrew also says נִכְנְסָה לְהֵרָיוֹן ("entered pregnancy") in everyday speech, but the root verb is לַהֲרוֹת.
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.