The word "bulk" refers to the large mass or size of something. It can indicate the physical volume of an object or the majority of something in terms of quantity or influence. In a more general context, "bulk" can also mean the main part or most significant portion of something.
The word "bulk" originates from the Middle English word "bulke," which means "a large quantity" or "a great deal." This term has roots in the Old Norse word "bölkr," meaning "a bundle or bale."