Mountainous (adjective)
Definition: extremely large
Source: http://www.merriam-webster.com/dictionary/mountainous
Found in: The Bell Jar by Sylvia Plath
Quote: “I figured the girl across from me couldn’t reach it because of the mountainous centerpiece of marzipan fruit…”
Here, the word mountainous is used to describe the large centerpiece that was blocking the girl from reaching over.