The word 急事 is formed by directly combining two meaningful characters: 急 (jí), which conveys the idea of "urgency" or "hastiness", and 事 (shì), which means "matter", "affair", or "business". It is constructed through a simple, intuitive method where the descriptive quality (急) is placed before the general category (事) to specify and create a new, concrete concept, essentially, an "urgent matter". This formation mirrors a natural, efficient way of thought, picturing a situation or task that demands immediate attention, with the combined characters creating a specific meaning greater than the sum of its parts.