IPA: /ˈsʌbˌtæsk/
KK: /sʌbˌtæsk/
A smaller task that is part of a larger task or project.
I divided the project into several subtasks to make it easier to manage.
Subtask → It is formed from "sub-" (meaning under or below) and "task" (from Old Norse *task*, meaning a piece of work or duty). The word "subtask" refers to a task that is part of a larger task, or a smaller task that is under the main task.
Think of a task that is 'under' ('sub-') a larger task — that's why a subtask is a smaller part of a bigger job.
No commonly confused words.