untamed

Etymology

From Middle English untamed, untemed, equivalent to un- + tamed and/or untame + -ed. Compare Dutch ongetemd (“untamed”), German ungezähmt (“untamed”), Danish utæmmet (“untamed”), Swedish otämd (“untamed”), Icelandic ótamin (“untamed”).

adj

1. Wild, uncontrolled, especially of animals not domesticated or trained to human contact.
   The mustang is an untamed horse that roams where it wants, with little interest in humans.
   John Wesley Powell ... the one-armed Civil War veteran led nine men in four wooden dories down the untamed and uncharted Colorado River and into the equally untamed and uncharted Grand Canyon. 27 November 2013, John Grotzinger, “The world of Mars [print version: International Herald Tribune Magazine, 2013, p. 36]”, in The New York Times