• 救急きゅうきゅう — emergency aid
• 救助きゅうじょ — rescue / relief
• 救援きゅうえん — support / assistance
• 救命きゅうめい — life-saving
• 救出きゅうしゅつ — extraction / rescue
• 救済きゅうさい — relief / salvation
• 救護きゅうご — first aid; protection

救 combines 求 (to seek) with 攵 (action), expressing an act taken to help or deliver relief—used in emergency and humanitarian contexts.

彼かれは 命いのちを 救すくわれた。
His life was saved.

救急車きゅうきゅうしゃを 呼よんでください。
Please call an ambulance.