| Interlingue | ile-000 |
| ínflexibil | |
| English | eng-000 | determined |
| English | eng-000 | dour |
| English | eng-000 | inflexible |
| English | eng-000 | obdurate |
| English | eng-000 | relentless |
| English | eng-000 | rigid |
| English | eng-000 | stiff |
| English | eng-000 | stubborn |
| Interlingue | ile-000 | dur |
| Interlingue | ile-000 | obstinaci |
| Interlingue | ile-000 | obstinat |
| Interlingue | ile-000 | renitent |
| Interlingue | ile-000 | resolut |
| Interlingue | ile-000 | rigid |
| Interlingue | ile-000 | severi |
| Interlingue | ile-000 | ínconciliabil |
| Interlingue | ile-000 | ínexorabil |
| Interlingue | ile-000 | ínpenitent |