One verb does it all: to take in. Take in a radio signal, take in an idea ("did you get it?"), take in a sound on tape, take in an immigrant. That last sense is the famous one for you: klita is the absorption of new arrivals, and a miklat is the shelter that takes people in. From signal to refugee, it is the same root receiving. Every entry 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.
The two live verbs split the job: pa'al is the receiver taking something in, hif'il is making a recording, causing a sound to be captured onto something. The matching passive hikaltut ("being absorbed") survives as a noun rather than a common verb. Other binyanim are not lexicalized for this root.
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.