noninflectional

adjective
non·​in·​flec·​tion·​al | \ ˌnän-in-ˈflek-shnəl How to pronounce noninflectional (audio) , -shə-nᵊl\

Definition of noninflectional

: not relating to or characterized by inflection : not inflectional a noninflectional vowel/affix a noninflectional language

First Known Use of noninflectional

1876, in the meaning defined above

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