Opposites based on joining:
* Separated: This is the most direct opposite, implying a division instead of a combination.
* Divided: Similar to "separated", indicating a splitting into parts.
* Split: More informal than "separated", implying a sudden division.
* Disjoined: This suggests a lack of connection between parts.
* Segregated: This refers to separating groups based on specific characteristics.
Opposites based on distinctness:
* Distinct: Emphasizes that things are separate and unique.
* Individual: Focuses on the unique identity of each entity.
* Independent: Indicates a lack of reliance or connection.
Opposites based on change:
* Unchanged: Implies no alteration or combination took place.
* Retained: Focuses on the preservation of separate entities.
The best antonym for "merged" depends on the specific situation and the meaning you want to convey.