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to intimidate; to frighten; to scare
to threaten (e.g. peace); to jeopardize; to endanger; to imperil
大きな音で住民を劫かしてはいけない。
You shouldn't frighten the residents with loud noises.
彼の態度は周囲の人を劫かした。
His behavior intimidated the people around him.
野生の動物を劫かすと危険だ。
It's dangerous to startle wild animals.