Gargantuan (adjective)

1. Extremely large in size or quantity, often beyond what is considered normal or reasonable.
2. Immense, huge, colossal, enormous.

Origin:

The word "gargantuan" is derived from the name of the mythical giant gargantua, it was first used in the early 17th century.

Examples:

1. The building was gargantuan in size.
2. The task was gargantuan in scope.
3. The meal was gargantuan in proportion.
4. The project was gargantuan in complexity.
5. The statue was gargantuan in scale.