Sub·serve v. t. [imp. & p. p. Subserved p. pr. & vb. n. Subserving.] To serve in subordination or instrumentally; to be subservient to; to help forward; to promote.
It is a great credit to know the ways of captivating Nature, and making her subserve our purposes, than to have learned all the intrigues of policy. --Glanvill.