• 保護ほご — protection / preservation
• 看護かんご — nursing / care
• 護衛ごえい — escort / guard
• 護身ごしん — self-defense
• 弁護べんご — legal defense
• 援護えんご — cover / support

The character 護 combines the radical 言 (speech / language) with phonetic and semantic elements related to defense and care. It is commonly used in formal or institutional contexts such as legal defense or medical care.

看護師かんごしが 患者かんじゃを 手厚てあつく 看護かんごしました。
The nurse gave warm and careful care to the patient.

弁護士べんごしは 容疑者ようぎしゃを 弁護べんごした。
The lawyer defended the suspect.