To be or get released or detached (as a chain on a motorcycle, a person who falls off the back of a cow or motorcycle, a plug from a socket, etc.); freed from one's obligation, debt, legal case, etc..
I'm released from my legal case (lit. my case is released).
The screw to the head of my motorcycle got detatched.
To unfasten, detach s.t. or s.o. from s.t.; to pay off a debt; to get free from s.t. or s.o.
The pa--un imp. focuses more on freeing a specific part of s.t. so as to change its position. The -an imp. focuses more on completely detaching s.t. from s.t.
Unfasten that cow from the cart.
That cow got free from the cart.
That child caused himself to get free from where his father was holding him on his side.