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