tremulously (adverb)

1. She walked down the runway tremulously, her hands shaking as she showcased the latest designer collection.

2. As the soldier stood on the battlefield, he fired his weapon tremulously, fearing for his life during the historic battle.

3. In the science fiction novel, the protagonist's heart beat tremulously as he encountered an extraterrestrial creature for the first time.

4. The choir sang the hymn tremulously, their voices filled with reverence during the religious ceremony.