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undiphthongized
undiphthongized adj. 
/(ˌ)ʌnˈdɪpθɒŋ(ɡ)ʌɪzd/, /ˌənˈdɪfθɔŋˌ(ɡ)aɪzd/, /ˌənˈdɪpθɑŋˌ(ɡ)aɪzd/, /ˌənˈdɪfθɑŋˌ(ɡ)aɪzd/
Brit. /(ˌ)ʌnˈdɪfθɒŋ(ɡ)ʌɪzd/
, /(ˌ)ʌnˈdɪfθɒŋ(ɡ)ʌɪzd//(ˌ)ʌnˈdɪpθɒŋ(ɡ)ʌɪzd/U.S. /ˌənˈdɪpθɔŋˌ(ɡ)aɪzd/
, /ˌənˈdɪpθɔŋˌ(ɡ)aɪzd//ˌənˈdɪfθɔŋˌ(ɡ)aɪzd//ˌənˈdɪpθɑŋˌ(ɡ)aɪzd//ˌənˈdɪfθɑŋˌ(ɡ)aɪzd/ΚΠ
1888 J. Wright Old High-German Primer 137 Old ō remained undiphthongised the longest in the Bavarian dialect.
1951 W. K. Matthews Langs. U.S.S.R. iii. 35 Undiphthongised long e and o.
2008 R. Wright in S. Barton & P. Linehan Cross, Crescent & Conversion 77 The name Mérida with its otherwise surprisingly undiphthongized short stressed [é].
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