# subsoil

> English word · Noun · IPA /ˈsʌbsɔɪl/ · frequency rank #71,946

## Definitions
1. The layer of earth that is below the topsoil.

## Etymology
From sub- + soil.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/subsoil