cagey

Etymology

Initially US colloquial, of unknown origin.

adj

1. Wary, careful, shrewd.
   Samara: I will be in the shadows watching, Shepard. You will never be alone -- this I swear. But you cannot barge in with guns and allies. Samara: Morinth is far too cagey -- she'd simply disappear. This is a subtle, delicate act. Trust me. 2010, BioWare, Mass Effect 2 (Science Fiction), Redwood City: Electronic Arts, →OCLC, PC, scene: Omega (Samara: The Ardat-Yakshi)
   But with both sides in the Premier League's bottom three before the game began, the three points at stake made for a cagey match. February 6, 2011, Alistair Magowan, “West Ham 0 - 1 Birmingham”, in BBC
2. Uncommunicative; unwilling or hesitant to give information.
   John F Kennedy’s secret talks with Soviet intelligence, surreptitious tape recordings and “girlfriend system” create a new portrait of a cunning and cagey JFK, according to a historian who has researched a treasure trove of recently released recordings and papers of the late president. 2015-10-07, Alan Yuhas, “JFK: declassified documents reveal a cunning and cagey president”, in The Guardian