Powerful — having strength, energy, or force; often used as 'powerful (something)'.
彼女はパワフルな歌声で観客を魅了した。
She captivated the audience with her powerful voice.
あの車はパワフルで坂道も楽に登れる。
That car is powerful and can climb hills easily.
プレゼン内容がパワフルで説得力があった。
The presentation was powerful and persuasive.