1. 不可思议的：sensation 感觉 | unimaginable 不可思议的 | character 人物,角色
2. 不可思议：17.不甘落后be unwilling to lag behind | 18.不可思议unimaginable | 19.不速之客uninvitedguest
3. 不可想象的：unfair 不公平的 | unimaginable 不可想象的 | unify 统一,使相同
4. 想不到的, 不可思议的：buoyant: 有浮力的, 轻快的 | unimaginable: 想不到的, 不可思议的 | vista: 展望, 回想
1. 不可想象的；难以理解的；异乎寻常的
If you describe something as unimaginable, you are emphasizing that it is difficult to imagine or understand properly, because it is not part of people's normal experience.
e.g. The scale of the fighting is almost unimaginable...
战斗的规模几乎无法想象。
e.g. The children here have lived through unimaginable horrors.
这里的孩子经历了难以想象的恐惧。