to tune something (see Karttunen)
YĒCTĒM(A) vt; pret: -TĒN to tune something / lo afina (guitarra, etc) [(3)Tp.219]. See YĒC-TLI, TĒM(A). Frances Karttunen, An Analytical Dictionary of Nahuatl (Norman: University of Oklahoma Press, 1992), 337.