diffidence
n. 无自信;羞怯;内向
例句
He tapped on the door, opened it, and entered with a certain diffidence.
他敲了敲门,打开了门,带着一些羞怯走了进去。
《柯林斯英汉双解大词典》
She overcame her natural diffidence and spoke with great frankness.
她克服了胆怯的毛病,非常坦率地说出了自己的想法。
《牛津词典》
There's a great deal of modesty and diffidence in my world.
在我的世界里,有着许多谦逊和缺乏自信。