The word 爆炸 is formed by combining two characters, 爆 and 炸, which both independently relate to the concept of bursting or exploding. 爆 carries the meaning of a sudden, violent bursting forth, often with heat or fire, while 炸 emphasizes the act of blowing apart or shattering from an internal force. When placed together, they create a single, intensified concept that vividly depicts a powerful, sudden, and destructive explosion, with the combination reinforcing and specifying the violent, bursting nature of the event.