The word 大战 is formed through a direct and conceptual combination of its two component characters. The first character, 大 (dà), means "big" or "great", acting as an intensifier. The second character, 战 (zhàn), means "war" or "battle", representing the core subject. By placing 大 before 战, the concept is semantically scaled up, creating a compound that conceptually means not just any war, but a "major war", "great battle", or "large-scale conflict", where the first element magnifies the scale and significance of the second.