tremulous - a. 전전긍긍하는, 와들와들 떠는, 무서워하는

• She spoke in a tremulous voice.
• These bodily changes can also affect the voice, making it sound tremulous, or disjointed by over-rapid breathing.
• He began the ceremony, and his low, tremulous voice could scarcely be heard through the moaning of the wind amid the tombs.