IPA: /ˌruːdɪˈmɛntəl/
KK: /rudɪˈmɛntəl/
Relating to the basic or fundamental aspects of something; not fully developed or advanced.
The students learned rudimental skills before moving on to more complex topics.
Comparative: more rudimental
Superlative: most rudimental
Rudimental → It is formed from "rudiment" (from Latin *rudimentum*, meaning a beginning or first principle) and the suffix "-al" (meaning pertaining to). The word "rudimental" refers to something that is basic or fundamental, relating to the first principles of a subject.
Think of 'rudiment' as the 'first principle' of something, and remember that 'rudimental' means relating to the basics or fundamentals.