'Xián yí' literally combines 嫌 (xián), meaning 'to dislike' or 'to suspect', and 疑 (yí), meaning 'doubt' or 'suspicion'. Together, they form a noun meaning 'suspicion (of guilt)' — specifically the state of being suspected of having committed a wrongdoing, often in legal or investigative contexts. It is not about general doubt but focuses on suspicion directed at a person or entity regarding possible illegal or improper behavior.

This term appears frequently in news reports, police investigations, and courtroom language. Unlike the more neutral word 'yí wèn' (question/doubt), 'xián yí' carries a strong connotation of potential culpability. It’s commonly used with verbs like 'yǒu' (to have), 'qīng chú' (to clear), or 'jiě chú' (to lift), and often modified by words like 'mǒu rén' (someone) or 'mǒu shì jiàn' (a certain incident). It is formal and rarely used in casual conversation.