| Subject | English | Japanese |
| gen. | n vs uk combining the working parts of two or more broken machines to make one functioning machine | 二個一 |
| gen. | n functioning cuff buttons on a jacket | 本開き (i.e. those that can be buttoned and unbuttoned) |
| gen. | n functioning cuff buttons on a jacket | 本切羽 (i.e. those that can be buttoned and unbuttoned) |