触しょく媒ばい

noun

catalyst

Primarily a chemistry term for a substance that speeds up a reaction without being consumed. Also used figuratively for a person or event that triggers change.

• この化か学がく反はん応のうには触しょく媒ばいが必ひつ要ようだ。

  This chemical reaction requires a catalyst.

• 彼かれのスピーチが