spiny
spiny \'spi--ne-\ aj 1: covered or armed with spines; broadly : bearing spines, prickle s, or thorns 2: abounding with difficulties, obstacles, or annoyances : THORNY 3: slender and pointed like a spine
Webster's English Dictionaryspiny \'spi--ne-\ aj 1: covered or armed with spines; broadly : bearing spines, prickle s, or thorns 2: abounding with difficulties, obstacles, or annoyances : THORNY 3: slender and pointed like a spine