| Clue | Source | Date |
|---|---|---|
| Unshakeable firmness of opinion | The Times Concise | 03 Sep 2026 |
| Ruthless stubbornness (8) | ||
| Ruthless stubbornness | The Guardian Speedy | 26 Nov 2023 |
| Your bad swimming involves constant rigidity | The Telegraph Toughie | 08 Jul 2022 |
| Stubbornness | The Times Concise | 27 Oct 2021 |
| Flower of the French is a bit blue and in a state that doesn't take to change | ||
| Occasional hobby of the French – risqué intransigence | ||
| Bullheaded refusal to change | Wall Street Journal | 10 Aug 2019 |
| Bullheaded refusal to change | ||
| Mulishness |