にかわって

expression

instead of; in place of; replacing

Used when someone or something takes over a role, duty, or position from another. Often implies substitution.

See also: にかわり

• 社しゃ長ちょうにかわって、副ふく社しゃ長ちょうが会かい議ぎに出しゅっ席せきした。

  The vice president attended the meeting instead of the president.

• 古ふるい機き械かいにかわって、新あたらしい機き械かいが導どう入にゅうされた。

  New machines were introduced, replacing the old ones.

expression

on behalf of; for

Used when acting for someone else, often in a representative or proxy capacity. Can overlap with sense 1 but emphasizes acting in someone's interest rather than simple replacement.

• 母ははにかわって、私わたしがお礼れいを申もうし上あげます。

  On behalf of my mother, I would like to express our gratitude.