To destroy s.t.; to dismantle (the parts of a machine, engine, furniture, house, or whole of anything); to destroy or ruin (one's reputation, one's religious beliefs, etc.).
The -an imp. focuses on dismantling whereas the -un imp. focuses more on destroying but sometimes they are used interchangeably.
Who destroyed part of my cart?
Dismantle that engine if you are going to fix it.
He destroyed people's trust in that woman.