ビシバシ

1. 1with repeated sharp blows ; whack after whack ; with crack after crack (of a whip) ; hard and repeatedly (striking) Translated by Jiyomi
2. 2strictly ; harshly ; without holding back ; relentlessly Translated by Jiyomi
3. 3vigorously ; singlemindedly ; wholeheartedly ; energetically Translated by Jiyomi

Other writings and readings

JMdict entry 2680470. Source and licence.