adverb, adverb taking the 'to' particle, noun or participle which takes 'suru'
Describes a place that is dirty, untidy, and crowded with things, often with a negative feel. Commonly used with ～した or ～する to describe a state or action.
彼の部屋はごみごみしていて、足の踏み場もない。
His room is so messy there's no place to step.
Shops are crowded together in this area.