untamed
adjective
[ ʌnˈteɪmd ]
• not domesticated or otherwise controlled.
• "Nepal was stunning with its wild, untamed landscape"
Similar:
wild,
savage,
feral,
natural,
free,
uncontrollable,
undomesticated,
unbroken,
not broken in,
untrained,
unused to humans,
brutish,
bestial,