power的形容词形式是powerful。
以ful结尾的形容词有:beautiful 美丽的grateful 感恩的peaceful 和平的,安宁的hopeful 有希望的wonderful 极好的useful 有用的fearful 害怕的helpful 有帮助的careful 小心的colorful 色彩的
例句:
This beautiful old building has been restored to its former glory.
Venice is a beautiful city full of culture and history.
She would be grateful for their company on the drive back
They hope for a peaceful settlement of the dispute.
She is hopeful of returning to work soon.
They had a wonderful time by the sound of it.