けんよう兼用ken'you
1.
The concept of using a single item for multiple functions or purposes, allowing it to serve different roles effectively.
2.
The practice of sharing an item or space among two or more individuals, facilitating joint access and utility.
3.
The act of integrating two or more components together for a unified purpose, enhancing functionality through combination.
Example:
この書斎は客間兼用だ。