Menyaachamlly: "You all", indefinite pronoun used here optionally. This is the second-person or "you" form of Tiipay nyaachamlly, "everyone, everything". Robertson's version seems to have a long "aa" in the first syllable, although the word is transcribed as nyachamlly in other sources. 'Iipay equivalent is nyaamat, which can also be made into menyaamat, "you all".
kenaam: "Go away! Leave!" (said to a group). Imperative of naam, plural of waam "goes away, leaves".