For in the background of all is the vast peninsula of Arabia, which at long intervals fills with its wild, untamable humanity to a point beyond which it cannot support them.
"To fight like a wild cat" is proverbial, and wild cats are described as some of the most ferocious and untamable of all animals.
He found that charcoal on burning yielded a "spirit," which he named spiritus sylvestris on account of its supposed untamable nature ("Gas sylvestre sive incoercibile, quod in corpus cogi non potest visibile"); and he invented the word "gas" in the expression: "...
How far this untamable character lends support to the view.
How would you define untamable? Add your definition here.