勢せい力りょく下かに

adverb

under the influence of

Used to indicate that someone or something is under the control, sway, or influence of a person, group, or force. Often appears in formal or written contexts.

• 彼かれはその政せい治じ家かの勢せい力りょく下かにあった。

  He was under the influence of that politician.

• その地ち域いきは長ながく外がい国こくの勢せい力りょく下かに置おかれていた。

  The region had long been placed under the influence of a foreign power.