形容词

1. （改变）巨大的，重大的；（任务）庞大的，艰巨的
You can use mammoth to emphasize that a task or change is very large and needs a lot of effort to achieve.

2. 猛犸，毛象（一种史前动物）
A mammoth was an animal like an elephant, with very long tusks and long hair, that lived a long time ago but no longer exists.

1. any of numerous extinct elephants widely distributed in the Pleistocene
extremely large with hairy coats and long upcurved tusks