How to say "backlash" in Japanese

• 反発はんぱつJLPT N1approx.Common
  noun, suru verb, intransitive verbBacklash as active opposition or resistance — a hostile reaction against a policy, decision, or statement. Choose this when people are pushing back against something, as when a plan draws strong opposition from the public.
  若者わかもの達たちは本来ほんらい、親おやの考かんがえに対たいして反発はんぱつするものだ。↗

  It is quite natural for young people to rebel against their parents.
• 反動はんどうCommon
  nounBacklash as a reaction or recoil — a counter-swing set off by a preceding trend rather than open opposition. Fits a backlash against reform as a swing in the opposite direction; also covers recoil or kick.

Use 反発 for backlash as active opposition or resistance to a policy, statement, or decision; use 反動 when the backlash is a reaction or counter-swing against a preceding trend, or a physical recoil or kick.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

• 反発はんぱつopposition
• 反動はんどうreaction
• バックラッシュbacklash
• 揺り戻しゆりもどしswinging back