IPA: //rʌsˈtɪkeɪtə//
KK: /rʌsˈtɪkeɪtər/
A person who causes or is involved in the act of rustication, which refers to the process of being sent away from a university or college, often for disciplinary reasons.
The rusticator was expelled from the university for his misconduct.
Rusticator is formed from "rusticus" (meaning rural or rustic) and the suffix "-ator" (meaning one who does or performs). The word refers to someone who lives in or is associated with the countryside, often implying a connection to rural life or farming.
Think of someone who embodies the 'rural' lifestyle ('rusticus') and is a 'doer' or 'performer' ('-ator') of activities related to the countryside.