The Chinese word **艰巨** (jiānjù) is a compound formed by combining two characters, each contributing a key aspect of its meaning. The first character, **艰** (jiān), carries the core sense of "difficulty," "hardship," or "arduousness." The second character, **巨** (jù), means "huge," "gigantic," or "immense" in scale or degree. When paired, they create a synergistic effect where **巨** intensifies the difficulty denoted by **艰**, resulting in the complete meaning of an "immensely difficult," "formidable," or "arduous" task—one that is not just hard but daunting in its magnitude and challenge. This follows a common Chinese morphological pattern where an adjective is reinforced by another adjective to express an extreme or amplified quality.