Last week the House passed a tax bill that would slightly tighten the law.

His lips tightened slightly, but he said nothing as Dainyl helped him into the chair.

Mary's hands tightened slightly on her teacup before she set it aside.

Then he froze, and his grip on her waist tightened slightly.

The interior of the ball seemed to tighten slightly.

Her sunny expression tightened slightly, and she stepped into the room.

The brackets at the edges of his mouth tightened slightly.

The young woman's mouth tightened slightly, but she certainly let no irritation into her voice.

She could not move back; the band tightened just slightly.

His hand tightened slightly on my shoulder, but I don't think he did it consciously.