對

• Spatial & Oppositional: Facing or positioned opposite another; confronting or standing in opposition to someone/something.
• Correspondence & Correctness: Matching or mirroring (e.g., a pair of couplets); "correct" or "right" as alignment with a standard, pattern, or expected counterpart.
• Communicative: Answering, responding, or addressing another.

• Verb: Transitive (to face, oppose, answer/reply) or Intransitive (to stand opposite).
• Adjective/Adverb: Correct, right, or acting in a corresponding manner.
• Measure Word: Used for matching pairs or sets (e.g., paired ornaments, couplets).

• 對 vs. 應: Both can mean "to respond." 對 emphasizes the directness of the interaction and the positioning of the speaker relative to the other; 應 tends toward fulfillment—responding to a call, meeting a requirement, or reacting to an external stimulus.

• Reading: Tang-period reading *duə̀i.
• Variants: U+5BF9 is a semantic and simplified variant.
• Evolution: Earlier texts typically place stronger weight on physical/spatial senses (facing/opposite), while later or more abstract contexts emphasize "correctness" as alignment.

The glyph centers on the relationship between two entities. When choosing a translation, consider if the context is primarily spatial (physical orientation), oppositional (hostility/competition), or based on correspondence (matching pieces of an exchange or alignment with a standard).