0 (of a person's voice or a part of their body) in a tremulous way (= shaking slightly), often because you are nervous or frightened:
"Is that really you?" he called tremulously.
Looking up tremulously, he found himself staring into the Princess's face.
Your voice had become a phantom quavering tremulously on the edge of an abyss.
He listened for a moment tremulously, and heard distinctly long, heavy sighs from within.
He could only speak in a whisper and tremulously.
She rose in her place, and said tremulously that she must go.
For a moment she looked at him with almost unseeing eyes, and her lips moved tremulously, as if she would speak and could not.