may, let, if, used with the optative of verbs instead of mā for maximum politeness; and xi- (imperative) = "please"; a polite way of phrasing the imperative
something; conjunction
James Lockhart, Nahuatl as Written: Lessons in Older Written Nahuatl, with Copious Examples and Texts (Stanford: Stanford University Press and UCLA Latin American Studies, 2001), 235.