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 expected a corresponding formation upon the opposite eastern versant: we found only a huge crest, a spine of black plutonic rock, intensely ugly and repulsive.

From The Land of Midian — Volume 2 by Sir Richard Francis Burton

Most of the rivers of the northern versant are comparatively small, as the island narrows into a kind of promontory.

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

For this purpose, they gave orders to Diego Garcias de Alfaro, an inhabitant of Lima who was versant in maritime affairs, to repair and fit out the two barks which had drifted on shore.

From A General History and Collection of Voyages and Travels - Volume 05 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

Judging from published records, this species is limited in Middle America to the Pacific versant.

From Noteworthy Records of Bats From Nicaragua, with a Checklist of the Chiropteran Fauna of the Country by J. Knox Jones