* Theoretical: This is the most direct opposite, focusing on ideas and concepts rather than observation and experience.
* Hypothetical: This refers to something based on assumptions and guesses, rather than proven facts.
* Speculative: This is similar to hypothetical, implying a lack of concrete evidence.
* Abstract: This refers to something conceptual and not based on reality.
* Intuitive: This relies on gut feeling and instinct, rather than logical reasoning and observation.
The best antonym for "empirical" will depend on the specific context and the meaning you are trying to convey.