This document defines assimilation as a common phonological process where one sound becomes more like an adjacent sound. It occurs because the articulators in our speech are not capable of instantaneous movement. Examples of assimilation in English include /s/ becoming /ʃ/ before /j/ or /ʃ/, as in "bless you" and "this yacht." Assimilation also occurs in Kurdish, where sounds like /h æʃt/ become /hæʒdæ/ due to neighboring phonemes. The function of assimilation is to ease articulation as languages develop and sounds influence each other.