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A little tricksy 4-worder.
"Liberi invidia vitam agimus"

Is "liberi" nominative plural in apposition to the subject of the verb, giving something like "We, the ones free from envy, are living our lives" or "We conduct life as those who are free from envy", or more compactly "We live life free of envy"?

Or could it possibly be genitive singular, giving "We live the life of one who is free from envy"?

I like liberi as the nom. pl. I like "We lead our lives free from envy."