Where does “nuclear-free” come from?

nuclear-free (English) comes from English -free, from Middle English -fre, from Old English -frēo, from Old English frēo, from Proto-Germanic *frī, from Proto-Germanic frijaz, from Proto-Indo-European priHós, from Proto-Indo-European preyH- — to love, to please.

nuclear-free (English): Free of nuclear weapons and/or nuclear power...