The word 大伙 is formed by combining two characters: 大 (dà), meaning "big" or "great", and 伙 (huǒ), which originally referred to a group of people sharing a meal or living arrangement, thus implying a "group" or "band". Together, they create a compound where the concept of scale ("big") is applied directly to the concept of a group, resulting in a meaning that emphasizes the entirety or the collective mass of a group, effectively meaning "everyone" or "the whole group". It’s a straightforward conceptual blend where one element modifies and amplifies the other to form a new, unified idea.