*naʔbacnaʔbáʔ1vnot know how to do something, be unable to docf=ša·naʔbayʔdu2adjignorant?Plural*nabacnabáʔʔama naʔbaccomp.abs.ʔama náʔbaʔinept, untalentednaʔbayʔduder.naʔbáyʔduunable, unskilled, ignorantcf*naʔbac 1=ša·*naʔbaca·laincep.naʔbacá·lawbecome puzzled, discover one does not know how