underplay

/AH0 N D ER0 P L EY1/
noun
  1. 1

    The act of underplaying.

verb
  1. 1

    To play in a subordinate, or in an inferior manner; to underact a part.

  2. 2

    To make something seem less important than it really is.

  3. 3

    To play a low card when holding a high one, in the hope of a future advantage.

Source: https://en.wiktionary.org/wiki/underplay