Select the most appropriate meaning of the given idiom.
To leave no stone unturned

The idiom "to leave no stone unturned" means to try every possible course of action, make every effort, or use every available resource in order to achieve a goal or find a solution.

Origin and Literal Meaning:
This expression has roots in an ancient Greek legend. After a battle, a search was conducted for a hidden treasure buried by a general. The Oracle of Delphi advised the searchers to "leave no stone unturned" to find it. Literally, it means looking under every single stone on the ground to ensure nothing is missed.

Figurative Application:
In everyday language, it refers to a thorough, exhaustive effort where no opportunity, option, or method is ignored. It signifies leaving nothing to chance and putting in maximum effort to succeed.

Therefore, the most appropriate meaning is "To do everything possible to achieve something".