拒否(きょひ)反応(はんのう)

きょひはんのう
noun
rejection reaction; adverse reaction; aversion
1. rejection reaction (medical); immune rejection
A medical term for the body's immune response against a transplanted organ or foreign substance.
臓器(ぞうき)移植(いしょく)の後(あと)、拒否(きょひ)反応(はんのう)が出(で)た。
A rejection reaction occurred after the organ transplant.
免疫(めんえき)抑制剤(よくせいざい)で拒否(きょひ)反応(はんのう)を抑(おさ)える。
Immunosuppressants are used to control the rejection reaction.
2. aversion; strong negative reaction; visceral rejection
Used figuratively to describe a strong instinctive resistance or repulsion toward an idea, change, or situation.
新(あたら)しい制度(せいど)に対(たい)して拒否(きょひ)反応(はんのう)を示(しめ)す人(ひと)が多(おお)かった。
Many people showed a strong aversion to the new system.
数学(すうがく)と聞(き)くだけで拒否(きょひ)反応(はんのう)が出(で)る。
Just hearing the word 'math' triggers an aversion in me.
社員(しゃいん)たちはシステムの変更(へんこう)に拒否(きょひ)反応(はんのう)を示(しめ)した。
The employees showed resistance to the system change.
新(あたら)しい上司(じょうし)のやり方(かた)に、最初(さいしょ)は拒否(きょひ)反応(はんのう)があったが、徐々(じょじょ)に慣(な)れた。
At first there was resistance to the new boss's methods, but people gradually got used to them.

A compound of 拒否(きょひ) (refusal, rejection) + 反応(はんのう) (reaction, response). Originally a medical term for immune rejection of transplanted tissue, now widely used figuratively for any strong instinctive aversion.

COMMON COLLOCATIONS:

  • 拒否(きょひ)反応(はんのう)が出(で)る: a rejection reaction occurs
  • 拒否(きょひ)反応(はんのう)を示(しめ)す: to show a rejection reaction
  • 拒否(きょひ)反応(はんのう)を抑(おさ)える: to suppress a rejection reaction
  • 拒否(きょひ)反応(はんのう)を起(お)こす: to cause a rejection reaction

USAGE:
The figurative sense (sense 2) is very common in everyday conversation and media. It describes an almost physical, gut-level resistance to something — stronger than simple dislike.

RELATED TERMS:

  • 拒否(きょひ): refusal, rejection
  • 拒絶(きょぜつ)反応(はんのう): rejection reaction (more formal medical term)
  • 反発(はんぱつ): repulsion, opposition — more active resistance
general
Added 2026.4.3 4:20
21500/21642_kyohihannou