• 警察けいさつ — police
• 観察かんさつ — observation
• 診察しんさつ — medical examination
• 察知さっち — perception, sensing
• 洞察どうさつ — insight
• 考察こうさつ — consideration, study

察 is often seen in formal or official contexts, especially related to observation, inspection, or deduction. It includes the 宀 radical (roof), which hints at enclosed observation or study indoors — like in police stations, clinics, or during detailed investigations.

医者いしゃは 患者かんじゃを 診察しんさつしました。
The doctor examined the patient.

彼かれの 表情ひょうじょうから 何なにかを察さっしました。
I guessed something from his expression.

This character is most commonly read as サツ in compounds like 警察 and 診察. While no common kun-yomi is used today, the original meaning of “seeing through” or “perceiving clearly” is still very much preserved in its usage.