* Misunderstand: This is the most direct opposite of understand, meaning to interpret something incorrectly.
* Misinterpret: Similar to misunderstand, this means to interpret something in a way that is not intended.
* Ignore: This means to pay no attention to something, which is the opposite of trying to understand it.
* Disregard: Similar to ignore, this means to treat something as unimportant or not worth considering.
* Neglect: This means to fail to pay attention to something, which can lead to a lack of understanding.
The best antonym for "understand" will depend on the specific situation and the intended meaning.