The word 无疑 is formed through the direct and logical combination of two conceptual characters: 无 (wú), meaning "without" or "to lack", and 疑 (yí), meaning "doubt" or "suspicion". These two ideas are fused together to create a single, unified concept, the state of being "without doubt". It functions not merely as a phrase but as a fixed compound where the first character negates the second, resulting in the meaning "undoubtedly" or "beyond doubt", representing a complete and indivisible idea of certainty.