Answer:
Chunking
Step-by-step explanation:
Chunking is a term that refers to the process of taking individual pieces of information (chunks) and grouping them into larger units.
When we take each piece of information into the larger whole, it is easier to remember the whole than try to remembering by itself.
In this example, Will tries to memorize the spelling of the word antidisestablishmentarianism, since it's a very large word difficult to remember, he group letters into chunks of information (anti, dis, establish, men,...) this way, by taking these individual pieces (or chunks) he will be able to remember the larger word more easily.
This process is called chunking.