Zompist Bboard Again

Am I missing something obvious in the Kebreni grammar?

We know that transitive verbs, when they appear without an object, should be read as passive.

But in a sentence like this: Kulseu, falaute mabu furina; neḣat obucrise there's an implied pronoun: kicked (him).

Are such sentences without an object just inherently ambiguous (in this case, with a possible, albeit unlikely in context, reading of "a man was kicked")? I guess benefactive inflection, among other things, could help to disambiguate.

Yes, neḣat obucrise is inherently ambiguous. As a standalone sentence, it would be "a man was kicked"; in the example, Gricean rules make it "a man kicked it" instead. (By Gricean I here mean that we assume the speaker is being relevant and helpful, so the sentence relates to the previous one rather than being a non sequitur about a man being attacked.)