macahua.

Headword: 
macahua.
Principal English Translation: 

abandon, leave behind; to give up, relinquish; agree

Orthographic Variants: 
macaua
IPAspelling: 
mɑːkɑːwɑ
Alonso de Molina: 

macaua. nite. (pret. onitemacauh.) dar licencia a otro.
macaua. nitla. vel. nic. (pret. onitlamacauh.) otorgar algo, o conceder, o soltar algo dela mano.
Alonso de Molina, Vocabulario en lengua castellana y mexicana y mexicana y castellana, 1571, part 2, Nahuatl to Spanish, f. 50r. col. 1. Thanks to Joe Campbell for providing the transcription.

Frances Karttunen: 

MĀCĀHU(A) vt to drop something, let go of something; to concede something, to give consent, to agree to something / dar licencia a otro (M), otorgar algo o conceder o soltar algo de la mano (M) Z has derived forms with MAH in place of MĀ . See MĀ(I)-TL, CĀHU(A). MĀCĀHUALŌ nonact. MĀCĀHU(A) MĀCĀHUALTIĀ caus. MĀCĀHU(A)
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 126.