The /-ok/ plural implies a base form /wëshashiw-àk/ with /wà/ realized as /ò/, but if that were the case the singular would be pronounced /wëshashu/ (with final /iw/ realized as /u/) instead of /wëshashi/ (with no final /w/). More likely, the plural is based on analogy with other tribal noun plurals in /-òk/.