IPA: /ˌdɪsɪˈplɪnərɪli/
KK: /ˌdɪsəˈplɪnərɪli/
In a way that relates to discipline or the enforcement of rules and standards.
The students were disciplined disciplinarily for their behavior during the event.
Disciplinarily → It is formed from "disciplinarius" (from Latin, meaning pertaining to discipline) and the suffix "-ly" (meaning in a manner). The word "disciplinarily" means in a manner related to discipline or training.
Think of 'discipline' as a way of training or teaching, and remember that 'disciplinarily' means acting in a way that relates to that training.