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42 iw in the ultima followed by a consonant is i̯w, as i̯wrch ‘stag’, rhodi̯wch ‘walk ye’, cofi̯wn ‘we remember’, wỿrddi̯wn ‘a myriad’. The only exceptions are the Mn. forms iw̯ch for Ml. ɥw̯ch ‘to you’, and niw̯l for Ml. nɥwl § 77 v, § 90.

iii. In all other cases iw is iw̯; thus (1) finally, as in i’w̯, Ml. yw̯ ‘to his’, rhiw̯ ‘hill’, briw̯ ‘wound’, edliw̯ ‘to reproach’, heddiw̯ ‘to-day’.

(2) In the penult or ante-penult, as diw̯edd ‘end’, ni|w̯eidio ‘to harm’, ciw̯dod ‘race, people’. Exceptions are the borrowed words si̯wrnai ‘journey’, si̯ŵr ‘sure’, and di̯wrnod ‘day’ when contracted, as in Gr.O. 88, for di|ẃrnod for Ml. W. diw̯ỿrnawd, 1a (generally in Ml. W. diw̯arnawt, a S. W. form).

iv. iw is disyllabic when it is formed by adding a syllable beginning with w to a syllable ending in i; thus gweddi ‘prayer’, gweddī́-wn ‘let us pray’, gweddī́-wr ‘suppliant’. In such words the i is generally written in Mn. W. with a diaeresis—gweddïwr.