邪

Core sense is deviation from a straight line or crookedness, manifesting in three primary contexts:

// Moral and Social: Behavior that deviates from the Dao or the rites (//li*); serves as the direct antonym of 正 (upright/correct). Senses include heterodox, deviant, perverse, or evil.

// Medical and Physiological: Pathogenic factors (//xièqì*) referring to external influences (e.g., wind, cold) or internal malfunctions that deviate the body from its natural balance.

• Physical: A literal sense of being skewed, slanted, or physically crooked.

When appearing in a final position, frequently functions as an interrogative particle marking a question, doubt, or wonder; often interchangeable with 耶.

In ethical or political discourse, the term is defined by its opposition to 正 (upright/correct).

Avoid over-moralizing based on modern dictionary glosses of "evil" or "wickedness." The translator should determine if the context is grammatical (a question), clinical (a pathology), or ethical (a judgment of character) before selecting a gloss. In medical texts, prefer terms such as "pathogenic," "invasive," or "abnormal."