im ‧ pu ‧ ni ‧ ty /ɪmˈpjuːnəti, ɪmˈpjuːnɪti/ BrE AmE noun
[ Date: 1500-1600 ; Language: Latin ; Origin: impunitas , from poena 'pain, punishment' ]
do something with impunity if someone does something bad with impunity, there is no risk that they will be punished for it:
It’s astonishing that these criminals are free to walk the streets with impunity.