What does advene mean?
The definition of advene
Ad*vene”, v. i.
Etym: [L. advenire; ad + venire to come: cf. F. avenir, advenir. See Come.]

To accede, or come (to); to be added to something or become a part of it, though not essential. [R.] Where no act of the will advenes as a coefficient. Coleridge.