| intent(adjective, firm, determined, usual, regular) |
| intractable(adjective, tough, firm, difficult, determined) |
| intransigent(adjective, severe, fixed, stiff, impassive) |
| inveterate(adjective, firm, determined, usual, regular) |
| ironclad(adjective, firm, cruel, determined, usual) |
| jailed(adjective, restrained, captive, confined, imprisoned) |
| mulish(adjective, tough, difficult, wild, determined) |
| opinionated(adjective, determined, fixed, stubborn, partisan) |
| packed up(expression, adjective, confined, enclosed, imprisoned) |
| pat(adjective, difficult, wild, determined, awkward) |
| penned in(expression, adjective, confined, enclosed, imprisoned) |
| pertinacious(adjective, tough, difficult, wild, determined) |
| perverse(adjective, hard, tough, sharp, difficult) |
| prearranged(adjective, firm, determined, usual, regular) |
| predetermined(adjective, firm, determined, usual, regular) |
| prescribed(adjective, firm, determined, usual, regular) |
| recalcitrant(adjective, tough, difficult, wild, awkward) |
| refractory(adjective, tough, firm, difficult, determined) |
| regular(adjective, firm, determined, usual, planned) |
| relentless(adjective, tough, firm, cruel, determined) |