IPA: /ˈfʊtˌhɪl/
KK: /ˈfʊtˌhɪl/
A small hill located at the base of a larger mountain or mountain range.
The hikers started their journey at the foothill before climbing the steep mountain.
Foothill is formed from "foot" (from Old English "fōt", meaning the lower part of the leg) and "hill" (from Old English "hyll", meaning a raised area of land). The word "foothill" refers to a hill that is at the base of a larger mountain or hill, resembling the foot of a larger structure.
Think of the 'foot' as the base of something, and the 'hill' as a raised area — a foothill is like the base of a larger mountain.