Assertion: diphthong's vowel | /r/HasProperty | preserved in case
Facets:
Source sentences:
text: In some cases a post-tonic vowel other than a is preserved in Catalan, as, for example, when that vowel forms a diphthong with the tonic (Deft, D e us; Ebriu, He bred s); or, again, it sometimes happens, when the tonic is followed by an i in hiatus, that the i persists (diliivi, dilfivium; servici, servicium; lbi, lbium; ciri, cereus); but in many cases these ought to be regarded as learned forms, as is shown by the existence of parallel ones, such as servey, where the atonic i has been attracted by the tonic and forms a diphthong with it (servIci, scrvii, serve)?).