diffident
adj
~ (about sth) not having or showing much belief in one's own abilities; lacking self-confidence 对自己的能力缺乏信心的; 露出怯态的; 缺乏自信的
an able but diffident young student 能干但缺乏自信的青年学生
Don't be so diffident about your talents. 别对自己的才能如此缺乏信心.
You'll receive my invitation soon enough, and I will inform you.
你很快会收到我的请柬,我会通知你的。
I used to take a walk in the early morning.
我过去常一大早出去散步。
Though people have often laughed at stories told by seamen, it is now known that many of these 'monsters' which have at times been sighted are simply strange fish.