歧视 (qíshì): Discrimination is when someone is treated unfairly or differently based on certain characteristics such as race, gender, or disability.
排斥 (páichì): Exclusion occurs when individuals or groups are intentionally left out or not included in certain activities or social circles.
偏见 (piānjiàn): Prejudice refers to preconceived opinions or attitudes about a person or group based on stereotypes rather than actual knowledge.