A more thorough explanation:

Dispunishable, adjective. A term used in history to describe an offense that is not punishable or answerable.

During the time of absolute monarchies, the king's actions were often considered dispunishable because he was above the law.

Another example of an dispunishable offense would be a crime committed by a diplomat who has diplomatic immunity.

These examples illustrate the definition of dispunishable because they both describe situations where someone is exempt from punishment or accountability for their actions.