This is a tiny, concrete root: to melt something solid until it flows, especially metal. The one living verb here is causative, you make the metal melt, and the one common noun, מַתֶּכֶת (metal), is the very stuff this verb acts on. Verb and noun describe two ends of one image: the smith pours, the metal that is poured. A small family, but it is the root behind a foundry. 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.
Modern Hebrew keeps only the hif'il of this root as an everyday verb, and the hif'il is causative: you act on the metal to make it flow. The old pa'al "to be poured out" survives mainly in Biblical and liturgical Hebrew. The passive partners are not lexicalized for daily use.
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.