IPA: /ˌspiːliəˈlɒdʒɪkəl/
KK: /spɪˈliːəˌlɒdʒɪkəl/
Relating to the study or exploration of caves.
The speleological research revealed many new species living in the cave.
**Speleological** → It is formed from "speleon" (from Greek, meaning cave) and "-logy" (from Greek "logia", meaning study or discourse). The word "speleological" refers to the study of caves and cave systems.
Think of 'speleon' which means cave, and '-logy' which means study. This helps you remember that speleological is about the study of caves.