mammoth

1. ADJ You can use mammoth to emphasize that a task or change is very large and needs a lot of effort to achieve. 巨大的; 艱巨的[強(qiáng)調(diào)]

...the mammoth task of relocating the library. …搬遷圖書館的艱巨任務(wù)。

2. N-COUNT 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. 猛獁