兼ねる

1. Origins, structure, and basic meaning

• Structure: 兼ねる, read かねる, means that one person or thing serves two or more roles or functions.
• Basic usage: It is used when one room serves as a guest room and a study, or a restaurant owner also works as chef.
  • この部屋は客間と書斎を兼ねている。

2. Common pitfalls and similar expressions

• Combining roles and 〜かねる
  • 客間と書斎を兼ねる means combining the two functions.
  • When attached to another verb, as in 答えかねる, かねる means that the action is difficult to do.