Quiz: Remember the definition of mal de mer?
"evasive, reticent," 1896, U.S. colloquial, of unknown origin. Earlier in English dialect it meant "sportive."
Shrewd; wary; pawky: a quiet, cagy observer
[1890s+; perhaps fr the expression play a caged game, ''be careful, keep your intentions concealed,'' attested in 1890s]