monomorphemic

[ mon-oh-mawr-fee-mik ]
/ ˌmɒn oʊ mɔrˈfi mɪk /

adjective

containing only one morpheme, as the words wait and gorilla.

Origin of monomorphemic

1935–40; mono- + morphemic
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019