The word 准许 is a compound formed through the combination of two synonymous morphemes, 准 (zhǔn, meaning "to approve" or "to grant") and 许 (xǔ, meaning "to permit" or "to allow"). This structure, known as a coordinative or parallel compound, merges two characters with closely related meanings to create a single, more formal and authoritative verb that means "to officially permit" or "to grant permission". The duplication of meaning reinforces and nuances the concept, making it stronger and more specific than either character alone, commonly used in official, legal, or formal contexts to denote sanctioned approval.