Origin: Latin suffix -ory
Subdirectory has 2 different meanings across 1 category:
(computer science) a directory that is listed in another directory
"After organizing my project files, I realized I needed to create a subdirectory within the main folder to keep all the source code separate from the documentation."
A directory located inside another directory.
"I created a subdirectory named 'reports' to keep all my quarterly files organized within the main project folder."