Here's a breakdown of the word:
* "Massa" - likely comes from the word "Massachusett", which was the name of a tribe living in the area.
* "chusetts" - likely comes from the word "chuset" which means "great hill" in Wampanoag.
Therefore, the full meaning of "Massachusetts" can be interpreted as "the place of the great hill" or "at the great hill". This likely refers to a prominent hill or mountain in the area, which could be the Blue Hills or another significant geographic feature.