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

He was well versant in military affairs and took great delight in war, of which he endured the labours and privations with much patient fortitude.

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

The fact that the lavas of Vesuvius have broken out on the southwestern side, while the old wall of the cone has remained unbroken on the eastern versant, has a curious explanation.

From Outlines of the Earth's History A Popular Study in Physiography by Nathaniel Southgate Shaler

Little versant in their pursuits, though respectful to their genius, after mutual salutations, the divine passes on and pays an evening visit to his illustrious neighbor, Dr. Thomas Goodwin.

From The International Monthly Magazine, Volume 5, No. 1, January, 1852 by Various

The rivers of the southern versant are waters of capacious drainage, the basin of the Kahayan having, for instance, an area of 16,000 sq. m., and the Barito one of 38,000 sq. m.

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