That bar is known for its disreputable reputation due to frequent fights.

disreputable 是由前缀 dis-（表示"否定、相反"）和 reputable（"声誉好的"）组成的形容词。reputable 来自名词 reputation（"声誉"）和形容词后缀 -able（"能够...的"）。 disreputable 字面意思是"声誉不好的"，引申为"声名狼藉的、不体面的"。