Morphological leveling

/mˌɔːfəlˈɒdʒɪkəl lˈɛvəlɪŋ/

/mˌɔːɹfəlˈɑːdʒɪkəl lˈɛvəlɪŋ/

a process in language change where irregularities in the inflectional or derivational morphology of words are simplified or regularized over time