Three letters for one gesture: sticking together. Physically it is glue and adhesion; biologically it is contagion, one body catching what another carries; spiritually it is dvekut, the soul cleaving to God. The same verb that glues a stamp describes a follower clinging to a teacher. Even the haunting dybbuk is a spirit that will not let go. 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.
Watch the voice shift: pa'al sticks of itself, nif'al gets stuck or gets infected (passive / spontaneous), hif'il makes something stick or passes the infection on (causative). One root, the whole grammar of contagion.
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.