From The Collaborative International Dictionary of English v.0.48:
Impunity \Im*pu"ni*ty\, n. [L. impunitas, fr. impunis without
punishment; pref. im- not + poena punishment: cf. F.
impunit['e]. See Pain.]
Exemption or freedom from punishment, harm, or loss.
[1913 Webster]
Heaven, though slow to wrath,
Is never with impunity defied. --Cowper.
[1913 Webster]
The impunity and also the recompense. --Holland.
[1913 Webster]