scot-free

[skot-free] /ˈskɒtˈfri/
adjective
1.
completely free from harm, restraint, punishment, or obligation:
The driver of the car escaped from the accident scot-free. The judge let the defendant off scot-free.
Origin
1200-50; Middle English; see scot, free
British Dictionary definitions for scot-free

scot-free

adverb, adjective
1.
(predicative) without harm, loss, or penalty
Word Origin
C16: see scot and lot
Word Origin and History for scot-free
adj.

Old English scotfreo "exempt from royal tax," from scot "royal tax," from Old Norse skot "contribution," literally "a shooting, shot; thing shot, missile," from PIE *skeud- "to shoot, chase, throw" (see shoot (v.); the Old Norse verb form, skjota, has a secondary sense of "transfer to another; pay") + freo (see free (adj.)). First element related to Old English sceotan "to pay, contribute," Dutch schot, German Schoß "tax, contribution." French écot "share" (Old French escot) is from Germanic.