紧：next; close; tight; closely；e.g.
那两家铺子紧挨着。
The two shops are next to each other.
这抽屉太紧了， 我打不开。
The drawer is so tight that I can’t open it.
这双鞋我穿太紧了。
These shoes are too tight for me.
全国人民团结紧。
The whole nation is closely united.
日程安排得很紧。
The programme is packed.