Jakob Jakobsen, An Etymological Dictionary of the Norn Language in Shetland…
“ The word may stand for *golder, *gølder, by metathesis of l, and, in that case, is the same word as No. gyldra, f., a) a watercourse in a narrow cleft (Aa.) ; b) a very narrow cleft (R.) . The definition indicates the form with “ø” to be the more probable, gloder b, as the name of a river, might poss. be the same as the Norwegian river-name “Glitra” (O. Rygh, No. Elvn.) . For the vowel-change cf. the preceding word. gloderet [glȯd··ərət·] and gloderi [glȯd··əri·] , adj., 1) of a cloud: bright, whitish, through which the sun shines; esp. in the pl.: g. cloods [‘clouds’] . ”
