The tumult of angry and warlike yells was checked instantly, and then from the depths of the woods went out such a tremulous and prolonged wail of mournful fear and utter despair as may be imagined to follow the flight of the last hope from the earth.
"One evening coming in with a candle I was startled to hear him say a little tremulously, ’I am lying here in the dark waiting for death.’
There are no more uses of "tremulous" in the book.
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She spoke timidly in a tremulous voice.
She tried to sound confident, but her voice was tremulous.