Archaic KJV Word
Servant
Modern equivalent: helper
What Was Lost
The pierced ear. In Exodus 21, a freed slave who chose to stay permanently with his master had his ear pierced against the doorpost -- a physical mark of voluntary, permanent, total submission. When Paul called himself a doulos of Christ, he meant his ear was pierced -- his will was no longer his own.
Closest Survivor in Modern English
servant (still used but heard as 'one who helps' rather than 'one who has surrendered their entire will')
Peak Usage (1611)
KJV Isaiah 42:1 -- 'Behold my servant, whom I uphold'; Philippians 2:7 -- Christ 'took upon him the form of a servant'
Died still used but domesticated (~1850)
Hebrew eved ('bond-servant/slave who has chosen permanent loyalty') and Greek doulos ('slave/one whose will is entirely submitted') were softened to 'helper' or 'employee' -- losing the total surrender dimension.
What Replaced It
“helper”
Voluntary and partial; eved was total surrender of one's will and identity to the master
“employee”
Contractual and temporary; eved was permanent, identity-defining, and all-encompassing
“volunteer”
Self-directed; a servant's agenda was entirely determined by the master