取り組む

1. Origins, structure, and basic meaning

• Structure: 取り組む（とりくむ） means applying oneself to a task or working to solve a problem.
• Basic usage: Mark the work being undertaken with に, whether it is a research problem or a craft project.

2. Common pitfalls and similar expressions

• Marking the task
  • 課題に取り組む means applying oneself to a task.
  • An expression for solving it, such as 課題を解く, marks the object with を.