• 勉強べんきょう — study
• 強力きょうりょく — powerful / mighty
• 強制きょうせい — enforcement / compulsion
• 最強さいきょう — strongest
• 説得力せっとくりょく — persuasive power

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The character 強 is made of 弓 (bow) and 虫 (insect or a phonetic element), originally conveying force or tension. It symbolizes strength, power, and sometimes the idea of compelling or forcing something. It’s often used in physical, mental, or persuasive contexts.

このチームは とても強つよいです。
This team is very strong.

しっかり運動うんどうして、体からだが強つよくなりました。
By studying every day, my Japanese has improved.