Plainly
look up a word, understand it — no rabbit hole
seismology
nounsyz-MAH-luh-jee
meaning in plain English
The science that studies the shaking and trembling of the ground, especially during earthquakes, to learn about what’s happening deep inside the Earth.
Think seismo = shake, logy = study — seismology is just the shake‑study, how we learn what Earth’s guts are doing.
for example
After the big earthquake, she decided to study seismology so she could understand what caused all the shaking.