1620s, "to destroy the strength of," from un- (2) "reverse, opposite of" + nerve (v.). Meaning "to deprive of courage" is recorded from 1704. Related: Unnerved; unnerving.
例文
1. He hoped to unnerve Kennedy and force him into concessions.
彼はケネディの信念を揺るがし、譲歩を迫ることを望んでいるだけだ。
2.Hitler turned and peered closely at his aide-de-camp.Those beady eyes never failed to unnerve Puttkamer.