単独

1. Origins, structure, and basic meaning

• Structure: 単独 is read as たんどく and means acting alone, independently, or without another participant.
• Basic usage: Adverbial use appears in 単独で行動する, while an activity done by one outlet appears in 単独取材.

2. Common pitfalls and similar expressions

• Adverbial and modifying forms
  • Use 単独で to describe how an action is done, or combine it directly with an activity as in 単独取材.
• Difference from 一人
  • 一人 directly counts one person; 単独 describes a person, animal, organization, or activity operating without companions or partners.