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 Kayan or Bulungan river is the only other in the eastern versant that calls for mention.

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

And beyond Al-Zaribah the traveller enters a region of water-courses tending West and South-West The versant is generally from the East and South-East towards the West and North-West.

From Personal Narrative of a Pilgrimage to Al-Madinah & Meccah — Volume 2 by Sir Richard Francis Burton

It appears that he was versant in the spasmodic diseases of women; and no more was wanting to induce the vulgar to regard him as a sorcerer, or performer of miracles.

From Ecce Homo! A Critical Inquiry into the History of Jesus of Nazareth: Being a Rational Analysis of the Gospels by Paul Henry Thiry Baron d' Holbach