-nwa

suffix. passive suffix; active participle (intransitive verbs), passive suffix; active participle (intransitive verbs); [ᴹQ.] perfective participle

-nwa

passive suffix

-nwa is said to be "a passive suffix" irregularly occurring in the word vanwa "lost" (PE17:63), the word seems to be irregular since the underlying root means "go away" and so vanwa is in a sense a past active participle, *"having gone". Compare PE17:68.