Principal English Translation:
just barely, just recently
Horacio Carochi / English:
Placing iuh after quin means something done recently, just done. Quin iuh ninonāmictia, in ōmomiquilì in notàtzin = I was recently married when my father died.
Horacio Carochi, S.J., Grammar of the Mexican Language with an Explanation of its Adverbs (1645), translated and edited with commentary by James Lockhart, UCLA Latin American Studies Volume 89 (Stanford: Stanford University Press, UCLA Latin American Center Publications, 2001), 353.
Attestations from sources in English:
Quin iuh ninēhua = I've only gotten up just now
Michel Launey, An Introduction to Classical Nahuatl, translated and adapted by Christopher MacKay (Cambridge: Cambridge University Press, 2011), 135.