んだit's that...なんだwhat is it? / Oh, I see!はんきごう!huh! (an expression of realization)なあんだoh, I see (used in a more informal and casual way)よねんisn't it? (used to seek agreement)んですit is (used to provide an explanation)んじゃないisn't it? / don't you think? (used for seeking confirmation)んきごう?huh? (used to express confusion or surprise)なぁんだoh, that’s it! (realization expression)んできごう?so, (inquiring about what follows)