General antonyms:
* Inappropriate: This is the most direct opposite, meaning not suitable or fitting.
* Improper: Similar to inappropriate, but often implies a violation of rules or standards.
* Unfitting: Emphasizes a lack of suitability for the situation.
* Inaccurate: Implies that something is wrong or incorrect.
* Unbecoming: Suggests something is not in good taste or doesn't reflect well on someone.
More specific antonyms:
* Unnecessary: Means something is not needed or required.
* Unwanted: Indicates something is not desired or preferred.
* Ineffective: Suggests something is not working as it should.
* Wrong: A general term implying something is incorrect or unsuitable.
Examples:
* "That dress is inappropriate for a job interview." (Antonym: appropriate)
* "The behavior of the students was improper." (Antonym: appropriate)
* "This gift is unnecessary, I don't need anything." (Antonym: appropriate)
* "The information was inaccurate and misleading." (Antonym: appropriate)
To give you the most accurate antonym, please provide the sentence or context where the word "appropriate" is used.