sìth

I

peace, Irish síth, síoth, Early Irish síth, Old Irish síd: *sêdos (neut. s stem), root sed (sêd) of suidhe, q.v.; Latin sêdo, settle; Lithuanian se$$?dáti, sit. Welsh hedd, peace, is from se$$ud.

II

a fairy, sìthich (do.), Irish sídh, a fairy hill, sígh, a fairy, sígheóg (do.), Old Irish síde, dei terreni, whose dwelling is called síd; in fact, síde, the fairy powers, is the pl. (ge. s. ?) of síd, fairy dwelling or mound, while its gen. sing. appears in mná síde, fir síde: *sêdos, g. sêdesos, as in the case of sìth, peace, which is its homonym (Stokes); root se, sêd, Greek $$Ge$$`dos, a temple or statue, literally an "abode" or "seat"; Latin noven-sides, noven-siles, the new gods imported to Rome. Thurneysen has compared Latin sîdus, a constellation, "dwelling of the gods". Hence sìthean, a green knoll, fairy knoll.