the GNU version of the Collaborative International Dictionary of English
adj. Incapable of being tamed; wild; untamed; untamable.
The Century Dictionary and Cyclopedia
Incapable of being tamed; untamable.
Word Usage
"She "left behind" a tribe of impressive children (7) and grandchildren (11), staff members and board members, scholars and politicians who learned from and benefited from her tameless passion for living and changing the world-for the better."