 Although every Yupik word contains "one and only one root" that is rigidly constrained to word-initial position, the ordering of the suffixes that follow can be varied to communicate different meanings, principally through recursion.The only exception lies with case suffixes on nouns and person suffixes on verbs, which are restricted to the end of the words in which they occur.Yupik is an ergative language both in nominal and verbal morphology.