Powerful; strong; vigorous — showing force, energy, or strength.
彼の演説は力強く、多くの人の心を動かした。
His speech was powerful and moved many people's hearts.
力強い握手で彼は自信を示した。
He showed confidence with a firm handshake.
筋トレを続けて、もっと力強い体になりたい。
I want to continue strength training and build a stronger body.
Reassuring; encouraging — giving a sense of security or encouragement.
彼女の励ましの言葉は、とても力強かった。
Her words of encouragement were very reassuring.
監督のコメントは若い選手たちに力強い影響を与えた。
The coach's comments had a powerful, encouraging effect on the young players.