花团锦簇 is formed by combining the two-character phrases 花团 (flower cluster) and 锦簇 (brocade cluster), where 花 means flower, 锦 means brocade, and both 团 and 簇 convey the sense of a cluster or gathering; this parallel structure directly pairs concrete nouns with repeating grouping terms to create a compound depicting dense, colorful assemblies.