Webster's Revised Unabridged Dictionary · 1913

Opportune

Opportune , adjective

[French opporiun, Latin opportunus, lit., at or before the port; ob (see Ob-) + a derivative of portus port, harbor. See Port harbor.]

Convenient; ready; hence, seasonable; timely. — Milton
This is most opportune to our need. — Shakespeare

Opportune , transitive verb

To suit. [Obsolete] — Dr. Clerke(1637)