The word "昊天" is formed by combining the characters "昊" and "天". "昊" is structurally composed of "日" (sun) placed above "天" (sky), creating an ideogram that represents the vast or expansive sky, while "天" is a pictogram meaning sky or heaven. Semantically, the two characters together form a compound noun where "昊" intensifies the scope of "天", resulting in the meaning "vast heaven" or "celestial sky".