IPA: /ˌɪntrəˈdʌktəri/
KK: /ɪntrəˈdʌktəri/
Relating to the beginning or first part of something, often used to help someone understand a subject or topic.
The introductory course provided a great overview of the subject.
Introductory → It is formed from "intro-" (meaning into) and "ducere" (meaning to lead) and the suffix "-ory" (meaning relating to). The word "introductory" refers to something that leads into a subject or topic, serving as an introduction.
Think of something that 'leads into' a topic ('intro-' means into and 'ducere' means to lead) — that's why introductory means it serves as an introduction.