noun
regenerative brake
A braking system that recovers kinetic energy as electricity, commonly used in electric and hybrid vehicles.
電気自動車は回生ブレーキでエネルギーを回収する。
Electric vehicles recover energy with regenerative brakes.
回生 means regeneration (of energy), while 回生ブレーキ specifically refers to the braking system that performs regeneration.
Compound of 回生 (regeneration) and ブレーキ (brake), a calque of English 'regenerative brake'.