Lexical morphemes (roots) must be dimoraic; this results in the nonphonemic vowel lengthening of CV roots, even when compounded, suffixed or followed by an enclitic: e.g., /bono/ 'river', made up of /bo-/ 'liquid' plus /-no/ 'his, her, its; part marker', is phonetically [bo:no], (6) showing that minimality constraints in terms of morae apply to the root rather than the phonological word.