At the heart of this root is a single gesture: putting something into someone else's hands. Limsor (לִמְסֹר) is to deliver, to hand over, to pass on. Hand over a few words and you have a meser (message). Hand over a way of life across generations and you have masoret (tradition), the thing literally passed down. And the person who gives themselves over completely is masur (devoted), with mesirut (devotion) as their abstract quality. To transmit and to be devoted are one act seen from giver and gift. 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 family lives almost entirely on the pa'al verb plus its participles. Modern Hebrew also uses the related verb הִתְמַסֵּר (hitpa'el, to devote oneself), but the verified family here keeps to the single pa'al; the rest of the meaning is carried by the nouns and adjectives, all of which are participle- or result-shaped.
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.