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non-inflectional
non-inflectional adj. 
/ˌnɒnɪnˈflɛkʃən(ə)l/,
Brit. /ˌnɒnɪnˈflɛkʃn̩(ə)l/
, /ˌnɒnɪnˈflɛkʃn̩(ə)l//ˌnɒnɪnˈflɛkʃən(ə)l/U.S. /ˌnɑnᵻnˈflɛkʃ(ə)nəl/
(also non-inflexional) /ˌnɑnᵻnˈflɛkʃ(ə)nəl/ΚΠ
1876 E. A. Freeman Hist. Norman Conquest V. xxv. 509 Had no Norman ever set foot on our shores, the inflexional Old-English would still have passed, sooner or later, into the non-inflexional modern English.
1937 Trans. Amer. Math. Soc. 41 16 C crosses every line through P, including the tangent at P, unless this tangent is non-inflectional.
1979 Ann. Rev. Anthropol. 8 366 The nonalphabetic orthography or the noninflectional morphology.
2001 China Rev. Internat. (Nexis) 22 Mar. Chinese is a non-inflectional language.
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