One physical image runs through every word: a knot, a thing tied. Likshor (לִקְשֹׁר) is to tie or bind. Tie two people and you have a kesher (a relationship, a tie); tie words to their setting and you have heksher (context); tie webpages together and you have a kishur (a hyperlink). Tie a whole society's messages and you have tikshoret (communication, the media). The same knot even has a dark side: to tie people together in secret is to conspire. From a shoelace to a phone call to a political plot, it is all the one root. 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.
A rich set: pa'al ties (and, in one sense, conspires), nif'al is its passive (to become attached), pi'el is the active connecting (to link), and hitpa'el is reflexive, tying yourself to someone, which in modern Hebrew became the ordinary word for phoning. The hif'il, pu'al and huf'al are not lexicalized here.
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.