What is an antonym for noisey?

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

General antonyms:

* Quiet

* Silent

* Peaceful

* Tranquil

* Still

* Serene

Antonyms specific to sound:

* Muffled

* Soft

* Subdued

* Hushed

Antonyms specific to activity:

* Calm

* Orderly

* Organized

* Peaceful

The best antonym will depend on what you are trying to convey. For example, if you are talking about a noisy party, "quiet" or "peaceful" might be appropriate. But if you are talking about a noisy engine, "muffled" might be a better choice.