What is impenetrable thorns refuse all?

Impenetrable thorns refer to the sharp and tough stems or branches found on certain plant species. These thorns are so strong and sharp that they are difficult to penetrate or break, making them a formidable barrier against animals and humans. Impenetrable thorns come in different sizes and shapes, depending on the plant species. Some examples of plants with impenetrable thorns include cacti, thorn bushes, rose bushes, bougainvillea, blackberry and hawthorn trees.

Refuse all, on the other hand, suggests that nothing can pass or penetrate through the barrier of thorns. This implies that the thorns are so sturdy that they can deflect or repel anything that attempts to cross or break through them. Therefore, the phrase "impenetrable thorns refuse all" emphasises the impenetrability and indestructibility of the thorns as well as their resistance to damage or penetration.