If "evolved" means "developed over time":
* Devolved: This implies a decline or deterioration.
* Regressed: This implies a return to a less developed state.
* Stagnated: This means to remain unchanged or undeveloped.
* Retrogressed: Similar to regressed, but suggesting a movement backward.
If "evolved" means "changed or adapted":
* Remained: This implies staying the same, without changing.
* Persisting: This implies continuing to exist without change.
* Unchanged: This means not having undergone any alteration.
* Static: This implies a lack of movement or development.
If "evolved" means "improved or advanced":
* Degraded: This implies a decline in quality or value.
* Deteriorated: This suggests a worsening of condition.
* Simplified: This means becoming less complex.
* Reduced: This implies a lessening in size or importance.
To give you the most accurate antonym, please provide the sentence or context where "evolved" is used.