page 563, under the word -nkwa, possessing, having, some sentences are given illustrating the usage and concord of the word ; while they are useful for that purpose, they are inappropriate, for -nkwa is only used where the possession is an acquirement, or a changed condition, and not an original or normal condition or possession. So that it is correct to speak of those whose hair has become grey as akwa mvu, for their hair was once of another colour ; but it is not correct to speak of black people as akwa ndombe, for that is their normal colour, and as there is no change in that respect, nkwa or akwa cannot be used.