geology
/dʒiˈɒlədʒi/·지올로지·noun
the science of the earth's structure
GreekCEFR B1
Root
geo- (earth) + Greek 'logos' (study)
Greek gē (earth) + -logia (study) → Medieval Latin geologia → English geology
In a word
geo (earth) + -logy (study) = 'the study of earth'. Volcanoes, earthquakes, minerals, fossils — every story the earth keeps fits inside one word. The same -logy still names biology, sociology, psychology. Every "-logy" we say at the end of a discipline is, finally, the heir of Greek logos.
Examples
Geology explains how mountains form.
He majored in geology.
Earthquakes teach us about geology.
Related
geographygeometrybiologylogicgeological