spiny

刺猬是一种小型带刺的哺乳动物。

Hedgehogs are small ___spiny mammals.

这种植物的茎上长满了刺状突起。

The stem of this plant is covered with ___spiny protrusions.

这种植物的茎干上长满了刺，看起来很危险。

The stem of this plant is covered with ___spiny projections, making it look dangerous.