1
opposition;rebellion;revolt;resistance;backlash;refusal
若者達は本来、親の考えに対して反発するものだ。
It is quite natural for young people to rebel against their parents.
2
rebounding;recoiling;repulsion
3
rally (e.g. in stock prices);recovery
Other forms
反撥 【はんぱつ】 (rarely used kanji form)