ἐλεύθερος
eleútheros
el-yoo'-ther-os
Greek: Adjective
probably from the alternate of ἔρχομαι; 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).

KJV translates as: free (man, woman), at liberty