IPA: /ˌkɒzməˈlɒdʒɪkəl/
KK: /kɑzˈmɑlədʒɪkəl/
Relating to the study of the universe and its structure, origins, and development.
The cosmological theories explain how the universe began and evolved over time.
Cosmological → It is formed from "cosmos" (from Greek "kosmos", meaning the universe or order) and "-logical" (from Greek "logia", meaning study or discourse). The word "cosmological" refers to the study or discourse about the universe and its origins.
Think of the word 'cosmos' which means the universe, and '-logical' which relates to study. This helps you remember that 'cosmological' is about the study of the universe.