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.
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: "...
"To fight like a wild cat" is proverbial, and wild cats are described as some of the most ferocious and untamable of all animals.
How far this untamable character lends support to the view.
How would you define untamable? Add your definition here.