mixed, blended, mix, mingle
襍 centers on things being mixed or blended together, whether physically mingling items or combining elements into a mixture.
襍 is a variant form of 雜 (now simplified to 雑 in modern Japanese). It combines 衤 (clothing) with 集 (gather), suggesting the idea of mixing or blending, possibly originally referring to mixed fabrics or assembled garments.
Clothing 衤 that gathers 集 different threads or fabrics together: the result is a mixed, blended piece.
For ザツ, imagine a mixed pile of zats (a made-up word for odds and ends) of clothing: zats -> ザツ, and the pile is a blend of everything.