• 政策せいさく — policy
• 対策たいさく — countermeasure
• 方策ほうさく — method / plan
• 無策むさく — lack of a plan
• 秘策ひさく — secret strategy
• 得策とくさく — wise plan

策 combines the radical ⺮ (bamboo) with the phonetic 朿 (し). It originally referred to a bundle of bamboo slips used for writing strategies or plans. Over time it came to mean “plan” or “scheme,” extending to political and tactical meanings.

新あたらしい 政策せいさくが 発表はっぴょうされました。
A new policy was announced.

地震じしんへの 対策たいさくが 必要ひつようです。
Countermeasures for earthquakes are necessary.