| Subject | English | Japanese |
| gen. | exp yoji An interchange between the transient and the immutable is central to the soul of haiku. | 不易流行 (Basho) |
| gen. | exp yoji Haiku is both "fluid and transitory" and "eternal and immutable." | 不易流行 |
| comp., MS | immutable ID | 不変 ID (A unique user identifier that must not change for the user over the lifetime of the user being in the system) |
| gen. | n yoji permanent and immutable | 恒久不変 |