Noah Webster
Subservient
SUBSERV'IENT, adjective [Latin subserviens.] Useful as an instrument to promote a purpose; serving to promote some end.
Hammond had an incredible dexterity, scarcely ever reading any thing which he did not make subservient in one kind or other.
1. Subordinate; acting as a subordinate instrument. These are the creatures of God, subordinate to him, and subservient to his will.
These ranks of creatures are subservient one to another.