IPA: /ˈɜːrθwɜːrm/
KK: /ˈɜrθˌwɜrm/
A type of worm that lives in the soil, helping to improve it by burrowing and breaking down organic material.
The gardener added earthworms to the soil to help it become more fertile.
Earthworm → The word is formed from "earth" (from Old English *eorþe*, meaning soil or ground) and "worm" (from Old English *wyrm*, meaning serpent or worm). An earthworm is a worm that lives in the soil or ground.
Think of 'earth' as the soil where these creatures live and 'worm' as a type of creature. This helps you remember that an earthworm is a worm that resides in the earth.