1640s, from Latin servientem "subordinate," present participle of servire "be a servant, be a slave" (see serve (v.)).
Online Etymology Dictionary, © 2010 Douglas Harper
Examples from the Web for servient
It does not presuppose any promise on the part of the servient owner.
For such rights might exist to active services which had to be performed by the person who held the servient estate.
There must exist a right against the servient owner before there is a right against anybody else.
This seems to be written of a rural servitude (aqua) which was lost by mere disuse, without adverse user by the servient owner.
Suppose I take this book and change it immediately into a servient human being.Hell
Robert G. Ingersoll