trem·u·lous 
/ˈtrɛmjələs/ adjective
/ˈtrɛmjələs/ adjective formal + literary 1 : shaking slightly especially because of nervousness, weakness, or illness
▪ She opened the letter with tremulous hands. ▪ He spoke with a tremulous voice. 2 [more tremulous; most tremulous] : feeling or showing a lack of confidence or courage
▪ He is a shy, tremulous [=timid] person. ▪ a tremulous smile
▪ She opened the letter with tremulous hands. ▪ He spoke with a tremulous voice.
▪ He is a shy, tremulous [=timid] person. ▪ a tremulous smile
— trem·u·lous·ly adverb
