Soft—yes, it was soft, but the way sand is soft, unyieldingly.
In spite of her usual good-nature she was unyieldingly stubborn.
"For that reason, play the part with all your might," he said, unyieldingly.
The Little Doctor struggled to release herself from the arms which held her unyieldingly and tenderly.
That his tastes, so far as music is concerned, were rigidly and unyieldingly ...