Gigantic (adjective)

1. Extremely large in size, amount, or degree.
2. Huge, gigantic, very large.
3. Unusually large in size or amount.

Origin:

From french gigantique and from latin gigas and from greek gigas meaning "giant".

Examples:

1. The waves were gigantic and powerful.
2. The statue was gigantic, towering over the city.
3. The task was gigantic and it required a lot of effort.
4. The building was gigantic and took years to construct.
5. The elephant's tusks were gigantic, weighing over a hundred pounds each.