noun, noun or participle which takes 'suru', intransitive verb
Refers to things accumulating or piling up over time, often with a nuance of stagnation or backlog. Used both as a noun and as a suru-verb (intransitive).
仕事が滞積して、なかなか片付かない。
Work has piled up and I can't seem to get it done.
倉庫
Inventory is accumulating in the warehouse.