Indescribably in example sentence
A sort of instinct seemed to warn him of her entrance, even when he did not see it; and when he was looking quite away from the door, if she appeared at it, his cheek would glow, and his marble-seeming features, though they refused to relax, changed indescribably, and in their very quiescence became expressive of a repressed fervour, stronger than working muscle or darting glance could indicate.