Summary

Jakob Jakobsen,  An Etymological Dictionary of the Norn Language in Shetland…

“ In the last expr., ila is often understood as denoting this kind of fishing. The stone used as an anchor is commonly called ilasten or ilafast. At “ila-fishing” it is, however, not often the custom now to anchor the boat. Edm. gives “eela, iela, a fishing-place or ground for small fish near the shore”; the anchoring of the boat is not mentioned. Here, accordingly, the central point of the original meaning of ila has been lost. — From Du. is reported a pl. form äils [äils] , with anglicised pronunc. ”
Source: Wikisource

Jakob Jakobsen,  An Etymological Dictionary of the Norn Language in Shetland…

“ The form “ʌ‘lta” is reported from Un. Sometimes with prefixed h; hilta [hɩ‘lta] and ilta [ɩ‘lta, e‘lta] : Fo. — Acc. to Edm. ilta is found also in sense of anger (U.?) . — Prob. the neut. form “illt” of O.N. illr, adj., bad; evil; hostile; unkind; harmful, etc., this form in Shetl. Norn then changing to a substantive, when the adjectives had lost their inflexion of gender. For the supporting final vowel, see e.g. doma, jema, lama (= lem) , skalv2, skalve, stomna, sbs. — ilta-fu’, full of mischief, desirous to do damage or harm ”
Source: Wikisource

Jakob Jakobsen,  An Etymological Dictionary of the Norn Language in Shetland…

“ O.N. íli, m., a stone with a rope, fastened to a boat and serving as an anchor.
ilafast [i̇̄··lafast·] , sb., a stone, fastened to a rope, serving as an anchor for a boat at the so-called ila-fishing; see the preceding word. to lie at de ilafast (Du., Papa) . fast appears originally to have denoted the rope rather than the stone (comm. called “de ilasten”) ; see fast and fasti, sb.
ilasod [i̇̄··lasōd·] , sb., a fishing-ground (sod, prop. a seat) near the shore, where rod-fishing from an anchored boat is carried on. U. *ílasát. See ila, sb., and sod, sodi1, sb.
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Source: Wikisource

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