Webster's Revised Unabridged Dictionary · 1913

Unturned

Unturned , adjective

[Prefix un- + turned.]

Not turned; not revolved or reversed.
[He] left unturned no stone To make my guilt appear, and hide his own. — Dryden
Collocations (1)
To leave no stone unturned , to leave nothing untried for accomplishing one's purpose.