• 看護かんご — nursing; care
• 看板かんばん — signboard
• 看守かんしゅ — guard; warden
• 看病かんびょう — caring for the sick
• 看取みとり — keeping vigil; watching over (one’s final moments)

看 combines 手 (hand) over 目 (eye) — shading the eyes with a hand to look closely or into the distance. From this image come senses like “watch,” “care for,” and “guard.”