v2.0
Publishing history:
v1.0: 01/10/24
v2.0: 13/06/25: Description of the phonetic development modified.
geàrraidh m. [ˈɡ̊ʲɑːɍi], 
In weakly stressed position, for example as generic in qualified place-names such as SG Geàrraidh a’ Bhàird NB360201, [ ̩ ɡ̊ʲɑˑɍi] or even [ ̩ ɡ̊ʲɑɍi] or [ ̩ ɡ̊ʲɑɍə] may be heard (Cox 2022, 727–28). In the plural, geàrraidhean, geàrrannan and geàrrachan are found (Cox 2002a, 58).
ON gerði yields EG *[ˈɡʲeɍʲðʲə], yielding *[ˈɡʲeːɍʲðʲə] with lengthening of the stressed vowel before r + consonant (a voiced dental fricative, as in ON garð acc. > SG gàrradh, q.v. – before the development of stressed epenthesis), yielding *[ˈɡʲeːɍʲʝə] with the development of the dental to a velar fricative, yielding SG *[ˈɡ̊ʲeːɍ(j)iː] 
With [ɍʲ] /ʀʲ/ falling together with [ɍ] /ʀ/, as in SG fairrge (Lewis) [ˈfɑɍ͡ɑɡ̊ʲə] /fɑʀ͡ɑɡ´ə/ ‘sea, ocean’.
Although fèarr in some dialects could be the result of lengthening of e rather than raising of à. A later treatment of ON rð in Gaelic is seen in ON urð > SG urrdh ‘pile of boulders’, q.v.
SG geàrraidh probably retains the sense ‘enclosure, enclosed land’ in older Gaelic-originated place-names in Lewis, particularly in village names (e.g. Geàrraidh na h-Aibhne NB235318, Na Geàrrannan NB193441) or those within villages (e.g. An Geàrraidh Mòr NB252467). Geàrraidh is synonymous with SG buaile (s.v. bòl) in the sense ‘enclosure’ in Harris; 
Faclan bhon t-Sluagh˄, s.v. gearraidh.
Faclan bhon t- Sluagh˄, s.v. gearraidh buntata, gearraidh feoir.
McDonald 1972, s.v. gearra-càil: ‘Islands’.
Oftedal 1954, 377.
Borgstrøm 1940, 26, 205.
Cox 2022, 727.
Faclan bhon t-Sluagh˄, s.v. gearraidh.
Henderson 1910, 117; MacBain 1911.
Faclan bhon t-Sluagh˄, s.v. gearraidh.
Faclan bhon t-Sluagh˄, s.v. gearraidh (corrected to geàrraidh).
For ON gerði in Old Norse loan-names in Scottish Gaelic, see for example (Lewis) SG Geardha Bheag (Cox 2022, 725–29) and, in final position, Àsmaigearraidh (465–68), Beagnaigearraidh (509–12), Crothairgearraidh (661–62), Mol Chadhaigearraidh (815–18), Tuimsgearraidh (959–62) and, in reduced form, Teànnraigir (707–08).