What is an antonym of festooned?

Here are some antonyms for "festooned," depending on the context:

If "festooned" means decorated with garlands:

* Bare

* Plain

* Unornamented

* Simple

* Sparse

* Undecorated

If "festooned" means adorned in a festive way:

* Drab

* Dull

* Stark

* Uninspired

* Uncelebratory

* Unfestive

If "festooned" means hanging in a decorative way:

* Straight

* Taut

* Rigid

* Uncurved

* Unhanging

The best antonym will depend on the specific meaning and context of "festooned" in your sentence.