What is an antonym for administrative?

There isn't a single perfect antonym for "administrative," as the meaning can vary depending on context. However, here are some options, depending on what aspect of "administrative" you want to contrast:

For "relating to administration":

* Operational

* Practical

* Technical

* Hands-on

* Creative (if emphasizing lack of structure)

For "concerned with managing, organizing, or controlling":

* Unstructured

* Free-flowing

* Spontaneous

* Unorganized

* Disorganized

For "bureaucratic":

* Informal

* Independent

* Unregulated

* Free

Ultimately, the best antonym will depend on the specific context of your sentence.