role-playing

/R OW1 L P L EY0 IH0 NG/
verb
  1. 1

    To Take on a role (in the sense an actor has a role) and enacting or playing that character.

noun
  1. 1

    Action in which a person takes on a role (as that of an actor) and acts out being that character.

Source: https://en.wiktionary.org/wiki/role-play, https://en.wiktionary.org/wiki/role-playing