IPA: //ˈɒstrəˌsɪzəm//
KK: /ˈɑstrəˌsɪzəm/
The act of excluding someone from a group or society, often as a form of punishment or social rejection.
The student faced ostracism from his peers after the incident.
Ostracism → It is formed from "ostrakon" (Greek, meaning shell or potsherd) and the suffix "-ism" (meaning a practice or system). The term originally referred to the practice in ancient Athens where citizens would vote by writing on pieces of pottery to exile someone from the city for a period of time, thus creating a system of exclusion.
Imagine ancient Athenians using shells ('ostrakon') to decide who to exclude from their community. This helps you remember that ostracism is about the practice of excluding someone.