「複雑」(ふくざつ) describes something that has many interconnected parts, making it difficult to understand, analyze, or deal with. It implies intricacy, often involving multiple factors or steps, and can refer to systems, problems, or emotions. Example: この機械の操作はとても複雑です。 (Operating this machine is very complex.)

構造や関係が入り組んでいて、理解が難しいこと。