PIE*per、前進、試みから、語源的にはfar、危険、経験と同じ。 attemptから派生して危険、恐怖を意味する。
Thus then we seek to put "the fear of God" into the natives at the point of the bayonet, and excuse ourselves for the bloody work on the plea of the benefits which we intend to confer afterwards. [Felix Adler, "The Religion of Duty," 1905]