This is the 4833rd most frequent Japanese word.
混み
"混み" (こみ) means "crowded" or "congested."
The term '混み' in '混んでいる' is used to describe the state of being crowded.
この電車は混んでいるので座れない。
This train is crowded, so I can't sit.
Here, '混みます' demonstrates an event in the future or regularly occurring situation where '混み' describes 'crowded'.
週末のショッピングモールはいつも混みますね。
The shopping mall is always crowded on weekends.
The usage of '混み過ぎていて' illustrates being excessively crowded.