manageable
Able to be handled or done without too much trouble.
Manageable means able to be handled, controlled, or dealt with successfully. When your teacher assigns homework that feels manageable, you know you can finish it without staying up all night. When a task is manageable, it might still require effort and concentration, but it doesn't feel overwhelming or impossible.
A manageable problem is one you can solve with the tools and time you have. If your little brother is in a manageable mood, you can keep him entertained without too much trouble. If the weeds in the garden are still manageable, you can pull them before they take over completely.
People often talk about breaking big projects into manageable pieces. Writing a ten-page research paper might feel impossible at first, but writing one page at a time becomes manageable. A skilled teacher knows how to make difficult subjects manageable by explaining them step by step.
The opposite of manageable is unmanageable: wild, out of control, or too difficult to handle. A student with unmanageable curly hair on picture day or a coach facing an unmanageable crowd of excited fans both face situations that have slipped beyond easy control.