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mó ᴍŪ, commórtas comparison, bórd ʙōʀᴅ and ʙŪʀᴅ, lent from Eng. when ō = ū on account of the labial.
In Thom. Des. not so many words are affected. mórga:órga:dóirse T. G. brónach:deorach Sheehy. Thom. móna:bóthar C. M. O.
lón:trócaire Denn 69, and so spoken, is an exception. nóta ɴōᴛə is sustained by Eng. ‘note’, Such instances as ó’n, órna ró-nádúrtha are not affected by the nasal.
4. o with w from gh, dh, etc., in auslaut contracts to ō. slógh ꜱʟō, clódh ᴋʟō, sógh ꜱō, sóghach ꜱōᴄ, with vocalic opening after w to ou, rogha, togha, etc. § 5, 1.
ú
§ 19, 1. ú with broad timbre i. e. after a broad consonant = Ū after a slender = ū. súl ꜱŪʟ, but fíu fyū, siubhal sūʟ. An instance of change in the same word is furnished by úd Ūᴅ, but siúd sūᴅ.
2. ú appears alone before broad consonants and in auslaut. úr, crú, lúth, cúl, lúdaidhe a lazy fellow. It represents the Norman-Eng, ou in old loan words, prisún, gúna, púnt, cúrsa, i gcúrsaidhe as for, with regard to, gallún.
3. ú arises often from u by contraction. mumha ᴍŪ or ᴍŪwə, umhal Ūʟ, ul Cat. 22. by position of mute and liquid búnsaig:mórgaig .|. ᴍŪʀɢɪg C. M. O. 8, bunsaig LU. p. 23b, 27. W. from bun, Cf. buinneán ʙᴡiŋǡɴ, súgradh from su- ꜱᴜɢʀ′ Dési.
4. ú = ə detoned before the accent, siúd é hiᴅē.
3. Digraphs and Diphthongs.
§ 20. ae=ᴇ is historically a middle grade between the O. I. diphthongs ai oi and modern ao. It is still sometimes written chiefly in auslaut, for a canon of the new orthography forbids e to touch any following consonant broad or slender. rae, lae gen. of lá, so sometimes aerach for later aorach.
