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

On the western versant of the Andes of Ecuador there are three river systems of considerable size—the Mira, the Esmeraldas and the Guayas.

From Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 10 "Echinoderma" to "Edward" by Various

On the inland versant a narrow native shaft has been sunk for gold by Mr. Sam, now native agent under Mr. Crocker.

From To The Gold Coast for Gold, Vol. II A Personal Narrative by Sir Richard Francis Burton

Diaz calls the two last, Teuleticle and Teatical; but though his facts are fully more to be depended upon, Clavigero may be accounted better versant in Mexican orthography.--E.

From A General History and Collection of Voyages and Travels — Volume 04 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

He was a native of Fife, and in early life became versant in occult science.

From The Mysteries of All Nations Rise and Progress of Superstition, Laws Against and Trials of Witches, Ancient and Modern Delusions Together With Strange Customs, Fables, and Tales by James Grant