This phrase means to search for something with complete thoroughness, to make every endeavour to find something. It was first recorded in 1550 in an anonymously published attack on dice-playing. It was also used in 1963 by President Johnson when announcing the terms of investigations into the cause of John F. Kennedy's assassination.

Übersetzung:

Himmel und Hölle in Bewegung setzen

Gegenteil(e)

The opposite of "leave no stone unturned" is "to do nothing".

Synonym(e):

You could also say: to leave no straw unturned or to do everything in one's power.