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

The western versant supplies the gold of Senegambia, the southern that of Ashanti and Wásá.

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

Llan means a level place generally, as most of your readers who are versant in those subjects know.

From Notes and Queries, Vol. IV, Number 110, December 6, 1851 A Medium of Inter-communication for Literary Men, Artists, Antiquaries, Genealogists, etc. by Various

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

Had they been more versant in the periodical literature of the day, they might in this 'slashing' style have caught perhaps a glimpse of the future candidate for their borough, the Right Honourable Nicholas Rigby.

From Coningsby by Benjamin Disraeli, Earl of Beaconsfield