Principal English Translation:
thus it shall be (see attestations)
See also ma ihui.
Attestations from sources in English:
ma yuh muchiua = May it be done (Amen).
Fray Alonso de Molina, 1546 (Códice Franciscano, 35–6); translation by Mark Z. Christensen, "Nahua and Maya Catholicisms: Ecclesiastical Texts and Local Religion in Colonial Central Mexico and Yucatan," Ph.D. Dissertation, Pennsylvania State University, 2010, Appendix B, 2.
Attestations from sources in Spanish:
ma yuh ye in amoyollo = estad seguros de ello
Rémi Siméon, Diccionario de la lengua náhuatl o mexicana (Mexico: Siglo XXI, 1988), 241.