favor A2

/ˈfeɪ.vɚ/ A helpful act that you do for someone.

disfavor C2+

/dɪsˈfeɪvɚ/ disapproval or dislike; to regard with disapproval

favoritism C2+

/ˈfeɪvərɪˌtɪzəm/ the unfair favoring of one person or group over others