| 偵 | [ zhēn ] to scout, to spy, to detect |
| 偵察 | [ zhēn chá ] to investigate a crime, to scout, to reconnoiter, reconnaissance, detection, a scout |
| 偵察兵 | [ zhēn chá bīng ] a scout, spy |
| 偵察員 | [ zhēn chá yuán ] detective, investigator, scout, spy |
| 偵察性 | [ zhēn chá xìng ] investigatory |
| 偵察機 | [ zhēn chá jī ] surveillance aircraft, spy plane |
| 偵探 | [ zhēn tàn ] detective, to do detective work |
| 偵查 | [ zhēn chá ] to detect, to investigate |
| 偵毒器 | [ zhēn dú qì ] detection unit |
| 偵毒管 | [ zhēn dú guǎn ] detector tube |
| 偵測 | [ zhēn cè ] to detect, to sense |
| 偵測器 | [ zhēn cè qì ] detector |
| 偵破 | [ zhēn pò ] to investigate (as detective), to solve (crime), to uncover (a plot), to sniff out, to break in and analyze, detective work, to scout |
| 偵緝 | [ zhēn jī ] to track down, to investigate and arrest |
| 偵聽 | [ zhēn tīng ] to eavesdrop, to tap (telephone conversations), to intercept and investigate |
| 偵訊 | [ zhēn xùn ] to interrogate during investigation |
| 偵辦 | [ zhēn bàn ] to investigate (a crime) and prosecute |
| ⇒ 刑偵 | [ xíng zhēn ] criminal investigation |
| ⇒ 國偵局 | [ guó zhēn jú ] abbr. for 美國國家偵察局|美国国家侦察局 |
| ⇒ 氣溶膠偵察儀 | [ qì róng zhēn chá yí ] aerosol detector |
| ⇒ 特偵組 | [ tè zhēn zǔ ] special investigation team (Tw) |
| ⇒ 立案偵查 | [ lì àn zhēn chá ] to file for investigation, to prosecute (a case) |
| ⇒ 經偵 | [ jīng zhēn ] economic crime investigation |
| ⇒ 美國國家偵察局 | [ meǐ guó guó jiā zhēn chá jú ] National Reconnaissance Office (of the United States) |
| ⇒ 輻射偵察 | [ fú shè zhēn chá ] radiation detection |