versed /vɜːst $ vɜːrst/ BrE AmE adjective formal
[ Date: 1600-1700 ; Language: Latin ; Origin: versatus , past participle of versari 'to be active, be busy with' , from versare ; ⇨ ↑ versatile ]
be (well) versed in something to know a lot about a subject, method etc:
a woman well versed in the art of diplomacy