versant

A gadget lover, Alexander is known to roll up his sleeves to become versant with the latest security technologies.

From Reuters ● May 26, 2013

I have heard from mariners and skilful pilots, much versant in the Indian seas, and have seen in their writings, that these seas contain 12,700 islands, inhabited or desert.

From A General History and Collection of Voyages and Travels — Volume 01 Arranged in Systematic Order: Forming a Complete History of the Origin and Progress of Navigation, Discovery, and Commerce, by Sea and Land, from the Earliest Ages to the Present Time by Robert Kerr

The rivers of the northern versant, such as the Nera, are, like those of Asturias, for the most part short, rapid and subject to violent floods.

From Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 4 "G" to "Gaskell, Elizabeth" by Various

There is hardly any versant or shed; in places the land sinks below the water-level; and, despite the excellent brick sewers, the showers prefer to sop and sod the soil.

From To the Gold Coast for Gold A Personal Narrative in Two Volumes.—Volume I by Sir Richard Francis Burton

The one great river of the eastern versant is the Kutei or Mahakan, which, rising in the central mountains, flows east with a sinuous course and falls by numerous mounts into the Straits of Madassar.

From Encyclopaedia Britannica, 11th Edition, Volume 4, Slice 3 "Borgia, Lucrezia" to "Bradford, John" by Various