If you're talking about the behavior of an animal:
* Wild: This is the most common opposite, meaning untamed, uncontrolled, and living in a natural state.
* Feral: This refers to a domesticated animal that has returned to a wild state.
* Untamed: This emphasizes the lack of control or training.
* Unruly: This implies difficulty in being managed or controlled.
If you're talking about the nature of something:
* Unruly: This can also apply to something that is not controlled or easily managed.
* Unrestrained: This refers to something that is not held back or limited.
* Unbridled: This emphasizes the lack of control or restraint.
If you're talking about language:
* Unpolished: This suggests a lack of refinement or sophistication.
* Crude: This is a strong term meaning rough, unrefined, and lacking in delicacy.
* Vulgar: This refers to language that is considered offensive or inappropriate.
Ultimately, the best opposite of "tame" depends on the specific situation and the intended meaning.