inflective

/ɪnˈflɛktɪv/
adjective
  1. Relating to or characterized by changes in word form to express grammatical relationships.
    • Latin is a highly inflective language, with many endings for nouns and verbs.
    • Inflective languages often require learners to memorize many different word forms.
    • English has some inflective features, such as adding '-s' for plurals and '-ed' for past tense.
Antonyms
What does "inflective" mean? | whatsthatwordmean | whatsthatwordmean