na-adjective, noun
confused; inconsistent; incoherent; patchy
Describes something that is a jumble of disparate elements, lacking coherence or consistency. Often used for ideas, arguments, collections, or knowledge. Slightly formal and literary.
彼の説明は雑駁で、何が言いたいのかわからなかった。
His explanation was confused and I couldn't understand what he wanted to say.
この本は内容が雑駁で、体系的にまとまっていない。
This book's content is patchy and not systematically organized.
混乱 is a noun/suru-verb for a state of disorder or confusion, often in situations or systems. 雑駁 is an adjectival noun describing the quality of being a mishmash of inconsistent elements, more about intellectual or informational incoherence.
支離滅裂 is a stronger, more emphatic term for something completely incoherent or nonsensical. 雑駁 is milder, suggesting a messy mixture rather than total logical breakdown.
Compound of 雑 (ざつ, miscellaneous, mixed) and 駁 (ばく, refute, contradict, patchy). The reading ざっぱく results from rendaku voicing of はく to ぱく. The word describes a state of being a confused mixture of various things.