unartificial

The isolated pair merely expressed their instincts in the unartificial, natural way.

There is something solid, something pleasant and unartificial, about them.

My wife is absolute nature, sir, simple, absolute—haw—unartificial nature.

But unartificial nature is, in my opinion—haw—yes, a very wise nature, sometimes.

Then she stood upon tiptoe to kiss him, she was so unartificial, even before the company.