(a.) Untrodden.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). invious. Retrieved September 20, 2026, from http://smartdefine.org/invious/definitions/2023487 |
| Chicago | Webster's. 2011. "invious" http://smartdefine.org/invious/definitions/2023487 (accessed September 20, 2026). |
| Harvard | Webster's 2011, invious, Smart Define, viewed 20 September, 2026, <http://smartdefine.org/invious/definitions/2023487>. |
| MLA | Webster's. "invious" 27 May 2011. Web. 20 September 2026. <http://smartdefine.org/invious/definitions/2023487> |