Enormous in size or strength: “the proliferation of superstores, superstadiums, elephantine convention centers” (Herbert Muschamp)
Ponderously clumsy.
El·e·phan·ti·ne (ĕĺə-făn-tī́nē)
An island of southeast Egypt in the Nile River below the First Cataract near Aswan. In ancient times it was a military post guarding the southern frontier of Egypt. The Elephantine papyruses, dating from the fifth century b.c., were discovered here in 1903.
The American Heritage® Dictionary of the English Language, Fourth Edition