General Antonyms:
* Sane: This is the most common and general antonym. It suggests a state of mental health and normalcy.
* Rational: This emphasizes logical thinking and sound judgment.
* Sensible: This implies practicality and good judgment.
* Normal: This suggests conformity to typical or average standards.
* Stable: This indicates emotional and mental equilibrium.
Other Antonyms Depending on Context:
* Calm: If you're referring to "crazy" as meaning "wild" or "uncontrollable."
* Reasonable: If you're referring to "crazy" as meaning "unrealistic" or "unreasonable."
* Wise: If you're referring to "crazy" as meaning "foolish" or "reckless."
* Level-headed: If you're referring to "crazy" as meaning "impulsive" or "unhinged."
Ultimately, the best antonym for "crazy" will depend on the specific context and the nuance you want to convey.