underplay -
play a card lower than (a held high card)
play engage in an activity as if it were a game rather than take it seriously; "They played games on their opponents"; "play the stock market"; "play with her feelings"; "toy with an idea"
playact,
roleplay,
act,
play behave in a certain manner; show a certain behavior; conduct or comport oneself; "You should act like an adult"; "Don't behave like a fool"; "What makes her do this way?"; "The dog acts ferocious, but he is really afraid of people"