It means tuning or warm the body. Put less hot. It is also softening or soften, soften the wax with fire. Moderate or undermine him to rage, controlled, calm down. Tanning, Tenderize or marinate leathers.
Nahuatl ( 41 mex;: be gentle and moderate, harmony.
I know that it comes from an indigenous tribe of the Argentina of the Yamana or Yagatas who lived in the archipelago or land of fire is what I understand. I know if I am in error.