Significados de unimpressionable nature en inglés

He threw away his cigar with an impetuosity oddly out of keeping with his somewhat rugged and unimpressionable nature.

And his would indeed have been a hard, unimpressionable nature not to have yielded the influence she was surely, but slowly, exercising upon him.

But unimpressionable natures are not so soon softened, nor are natural antipathies so readily eradicated.