What is the meaning of Skel?

Alternative form of skell.

to use insults, to swear, to hurl abuse

boundary, dividing line

barrier

distinction

shell (The calcareous or chitinous external covering of mollusks, crustaceans, and some other invertebrates. )

shell, husk

cross-eyed, squinting

shell

must, shall, should, ought to

shall, will

Source: wiktionary.org