• 検査けんさ — inspection, test
• 調査ちょうさ — investigation, survey
• 査定さてい — assessment, appraisal
• 審査しんさ — screening, review
• 巡査じゅんさ — police officer (patrol)
• 踏査とうさ — field survey
• 捜査そうさ — criminal investigation
• 査収さしゅう — inspection upon receipt

会意 + 形声文字. The character is made from 木 (tree) and the phonetic 乍 (サ). According to KADOKAWA, the tree element originally referred to branches, symbolizing detail or variety, and the full character came to mean “to examine” or “investigate.” Borrowed from the character 植 (サ) and repurposed for its sound and meaning.

事故じこの 原因げんいんを 調査ちょうさする。
We will investigate the cause of the accident.

警察けいさつが 現場げんばを 捜査そうさしています。
The police are investigating the scene.

The only reading in use is the on-yomi サ (sa), which appears in many formal compound words. No kun-yomi is commonly used in modern Japanese.