Intimidation or threat. A noun (or used as a suru-verb) meaning to frighten someone or coerce them by threats; similar to 'to menace' or 'to threaten'.
犯人は被害者に金を出すように恐嚇したとして逮捕された。
The suspect was arrested for intimidating the victim into handing over money.
会社は顧客への恐嚇行為を厳しく禁止している。
The company strictly forbids any acts of intimidation toward customers.
脅迫と恐嚇は似ているが、恐嚇は威嚇的な振る舞い全般を指すことが多い。
Although similar to coercion, '恐嚇' often refers more broadly to threatening or menacing behavior.