Proto-Iroquoian as reconstructed shares the Iroquoian languages' notable typological traits of small
consonant inventories, complex consonant clusters, and a lack of
labial consonants.
Vowels The reconstructed vowel inventory for Proto-Iroquoian is: Like later Iroquoian languages, Proto-Iroquoian is distinguished in having
nasal vowels and , although it has more than in its daughter languages.
Consonants The reconstructed consonant inventory for Proto-Iroquoian is given in the table below. The consonants of all Iroquoian languages pattern so that they may be grouped as (oral) obstruents, sibilants, laryngeals, and resonants (Lounsbury 1978:337). ==Morphology==