favoritism

US /ˈfeɪ.vər.ə.tɪ.zəm/
UK /ˈfeɪ.vər.ə.tɪ.zəm/
1.

sự thiên vị

unfair support shown to one person or group, especially by someone in authority:

:
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A parent must be careful not to show favoritism toward any one of their children.
:
favorite