# subterraneous

> English word · Adjective

## Definitions
1. Subterranean.

## Etymology
Adapted borrowing of Latin subterrāneus + -ous. Doublet of subterrane.

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