This mushroom contains a powerful hallucinogen that makes people see colors and patterns that aren't real.

hallucinogen 由词根 hallucin-（幻觉）和后缀 -ogen（产生...的物质）组成。hallucin-来自拉丁语，意为"幻觉"或"错觉"；-ogen 表示"产生...的物质"。 hallucinogen 指"能引起幻觉的物质"，即"致幻剂"。