probably from the alternate of G2064; unrestrained (to go at pleasure), i.e. (as a citizen) not a slave (whether freeborn or manumitted), or (genitive case) exempt (from obligation or liability):--free (man, woman), at liberty.
freeborn
in a civil sense, one who is not a slave
of one who ceases to be a slave, freed, manumitted
free, exempt, unrestrained, not bound by an obligation
in an ethical sense: free from the yoke of the Mosaic Law