The word 有毒 is formed through straightforward conceptual combination: the character 有 (yǒu), meaning "to have" or "to possess", is placed directly before the character 毒 (dú), meaning "poison" or "toxin". This creates a literal, transparent compound where the meaning of the first character actively modifies the second, resulting in the direct and intuitive concept of "having poison" or "possessing toxicity", which is understood as "poisonous" or "toxic". It is a direct fusion of two independent, concrete ideas into a single descriptive term.