micohuani.

Headword: 
micohuani.
Principal English Translation: 

deadly weapon, instrument (see Karttunen); poison

IPAspelling: 
mikowɑni
Frances Karttunen: 

MICOHUANI deadly weapon, instrument / cosa mortífera o ponzoñosa (M), instrumento para morir. (C) [(2)Cf.345V]. See MICOHUA.
Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 146.

Attestations from sources in English: 

micohuani (adjective) = mortal, deadly
Daniel Garrison Brinton, Ancient Nahuatl Poetry: Containing the Nahuatl Text of XXVII Ancient Mexican Poems (1877), 157.

Ca micōhuani in = this is poison (thing by which one dies)
Michel Launey, An Introduction to Classical Nahuatl, translated and adapted by Christopher MacKay (Cambridge: Cambridge University Press, 2011), 165.