noun, noun or participle which takes 'suru', intransitive verb
opposition; resistance; backlash; rebellion
Active resistance or pushback against an idea, rule, authority, or trend. Can range from mild refusal to organized revolt.
新しい規則に社員から強い反発があった。
There was strong opposition from employees to the new rule.
若者の間で親の世代の価値観に反発する動きが見られる。
Among young people, there is a movement pushing back against the values of their parents' generation.
noun, noun or participle which takes 'suru', intransitive verb
rebounding; recoiling; repulsion
Physical bounce-back or recoil; also used for magnetic/electrical repulsion. Often appears in technical contexts.
ボールが壁に当たって反発した。
The ball hit the wall and rebounded.
同じ磁極同士は反発し合う。
Like magnetic poles repel each other.
noun, noun or participle which takes 'suru', intransitive verb
Financial or market context: a price or index rising again after a decline. Often used with 株価, 相場, etc.
株価は底値から反発した。
The stock price rallied from its bottom.
市場は予想外の反発を見せた。
The market showed an unexpected recovery.