"Elephantiac" Natural Recordings by Native Speakers
It seems like there's a small mistake in the word provided. The correct word is "elephantiac". There is no such word as "elephantiac". However, the word "elephantiac" is not a valid English word either.
If you meant to type "elephantine", it would make more sense. "Elephantine" can be used to describe something that is majestic, large, or impressive, much like an elephant.
For example: "The ancient ruins were truly elephantine in scale."