tremulous /ˈtrɛmjələs/ adjective Learner's definition of TREMULOUS
formal + literary
1
: shaking slightly especially because of nervousness, weakness, or illness(尤指因紧张或疾病等)颤抖的,哆嗦的 2
[more tremulous; most tremulous] : feeling or showing a lack of confidence or courage胆小的;怯懦的