IPA: /ˈsʌbˌfiːld/
KK: /sʌbˌfiːld/
A smaller area of study within a larger field or discipline.
The researcher specializes in a subfield of biology that focuses on marine ecosystems.
Subfield → It is formed from "sub-" (meaning under or below) and "field" (from Old English "feld", meaning an open land or area). The word "subfield" refers to a specialized area or discipline that exists under a broader field of study.
Think of a 'field' as a broad area of knowledge, and 'sub-' means 'under' — so a subfield is a specific area that exists under that broader field.