adjective
gargantuan
gar-GAN-choo-un/ɡɑːrˈɡæntʃuən/
Extremely large or massive.
The gargantuan sequoia dwarfs the woman beside it.

Etymology
Gargantua is the voracious giant in Rabelais’ novels. With the adjective ending -an, his name became a way to describe anything of enormous size or amount.
In context
the Anaconda family consists of five species among them the largest snake in the world while the gargantuan proportions of a green anaconda are subject to Wild speculation
More examples
- The film features a gargantuan sea creature.
- Clearing the archive proved a gargantuan task.
- He served a gargantuan portion of pasta.
Forms
gargantuan