elementary
Relating to the basic, essential or fundamental part of something.
Very simple.
Relating to an elementary school.
Fundamental: serving as a building block for more complicated structures or processes.
Relating to a subatomic particle.
Involving only a single reaction step and transition state.
Which performs a row or column operation on another matrix when the two are multiplied; see Elementary matrix on Wikipedia.Wikipedia (Such matrices are called "elementary" because they generate the general linear group).
Arising from Vieta's formulas; see Elementary symmetric polynomial on Wikipedia.Wikipedia
Straightforward, employing only basic techniques; not requiring substantial knowledge (of some particular domain, object, etc.).
Making no use of complex analysis.
Sound Patterns & Rhymes
Alliteration
Words starting with the same consonant sound — used in poetry and prose to create rhythm, emphasis, and memorable phrasing (e.g. “Peter Piper picked”)
Assonance
Words sharing similar vowel sounds regardless of starting letter — creates internal melody in writing