| Clue | Source | Date |
|---|---|---|
| Weariless, unseal exhibit for analysis (13) | ||
| Unable to be used up (13) | ||
| Unlimited | The Guardian Quick | 16 Nov 2022 |
| Endless | The Telegraph Quick | 08 Jul 2022 |
| Tireless | The Times Concise | 01 Feb 2021 |
| Tireless | The Telegraph Quick | 18 Apr 2017 |
| Impossible to use up | Family Time | 01 Mar 2015 |