subserve
verb (used with object)
to be useful or instrumental in promoting (a purpose, action, etc.).
Used to express a completed action that took place before another specific past action occurred.
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
For more than twenty years magneto-electricity had subserved its first and noblest purpose of augmenting our knowledge of the powers of nature.
From Fragments of science, V. 1-2 by John Tyndall