Answer: impassive

AnswerCrossword Clue
IMPASSIVELike a good Texas hold 'em player
IMPASSIVEVolatile as a wooden Indian.
IMPASSIVEPhlegmatic.
IMPASSIVECalm.
IMPASSIVEUnresponding
impassiveNot feeling or showing emotion
impassivenot showing feeling or emotion