This root means hitting the mark exactly: no more, no less. It lives almost entirely in the pi'el, the intensive mould, because precision is something you actively work at, not something that just happens. From the one verb radiate a precise person, a precise thing, and the abstract noun "precision" itself. The same idea also gives Hebrew diktduk, grammar, the art of getting every letter exact. 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.
This root is essentially a one-binyan root: it lives in the pi'el, the intensive mould, which fits the idea of effortful, deliberate precision. There is no everyday pa'al "to be exact"; the work of getting things right is always framed as intensive.
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.