| Answer | Crossword Clue |
|---|---|
| stubborn | Difficult to move, remove, or cure |
| retreated | Move back or withdraw, esp. so as to remove oneself from a difficult or uncomfortable situation |
| retreating | Move back or withdraw, esp. so as to remove oneself from a difficult or uncomfortable situation |
| ingrained | (of dirt or a stain) Deeply embedded and thus difficult to remove |
| heaviest | Of great weight; difficult to lift or move |
| unwieldiest | Difficult to carry or move because of its size, shape, or weight |
| unwieldier | Difficult to carry or move because of its size, shape, or weight |
