trepidation
词根词缀：
intrepid adj. 大无畏的
in 不，无 + trepid 颤抖的 → 不颤抖 → 大无畏的
trepidant adj. 胆怯的，不安的
trepid 颤抖的 + ant …的，具有…性质的 → 胆怯的，不安的
trepidation n. 胆怯
trepid 颤抖的 + ation 行为，过程，状态，结果 → 因胆怯而颤抖 → 胆怯
数据来源：新东方英语词汇速记大全
相关例句：
Any trepidation grows rapidly worse if you look towards the ground.
如果你朝地面看&再轻微的恐惧感也会迅速加重。
Numb and following blindly are really a kind of happiness under their ruling and can prevent human from confronting some trepidation and conflict.
在他们的统治之下，麻木和盲从真的是一种“幸福”，它们可以让人免却一些恐慌和矛盾。
Although my trepidation was not completely assuaged, I was excited.
虽然我的种种担心并没有完全缓和，我还是很激动。
I thought Carol would be nervous when she made her speech, but she delivered it without trepidation.
我本以为卡罗尔发表演说时会紧张，但他讲话时却一点也不害怕。
He accosted me with trepidation and passed on.
他慌慌张张地向我打了个招呼就走开了。
It was with some trepidation I approached the tent.
走近帐篷时我感到颇为惊讶。