how? What? Used in answering a call. Why? What is the cause of it? It is also an exclamation, as ahoana ary! Well then! It admits of the suffix pronouns and tenses: ny faty aza ahoako: I care not for, or I trouble not myself about death; death has no fear for me! ~ ahoanao izany?: what is that to you? [Richardson 1885]
why? how? [Hallanger 1973]
why? [Hallanger 1973]