Ido - Phonology

Phonology

Ido has seven vowels composing five vowel phonemes. The vowels /e/ and /ɛ/ are interchangeable depending on speaker preference, as are /o/ and /ɔ/. The combinations /au/ and /eu/ become diphthongs in word roots but not when adding affixes.

Ido vowels
Front Back
Close i u
Mid e, ɛ o, ɔ
Open a
Ido consonants
Bilabial Labio-
dental
Alveolar Post-
alveolar
Palatal Velar Glottal
Nasal m n
Plosive p b t d k ɡ
Affricate t͡s t͡ʃ
Fricative f v s z ʃ ʒ h
Tap ɾ
Approximant l j w

All polysyllable words are stressed on the second-to-last syllable except for verb infinitives, which are stressed on the last syllableskolo, kafeo and lernas for "school", "coffee" and the present tense of "to learn", but irar, savar and drinkar for "to go", "to know" and "to drink". If an i or u precedes another vowel, the pair is considered part of the same syllable when applying the accent rule – thus radio, familio and manuo for "radio", "family" and "hand", unless the two vowels are the only ones in the word, in which case the "i" or "u" is stressed: dio, frua for "day" and "early".

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