The word unselective refers to something that lacks discrimination or a discerning approach. There are several synonyms that can be used to describe this concept, such as indiscriminate, random, haphazard, unsystematic, and arbitrary. Indiscriminate suggests acting without careful consideration or without regard for individual differences, while random implies a lack of aim or purpose. Haphazard refers to something that is unplanned, disorganized, and lacking in coherence. Unsmytematic conveys the idea of a lack of method or system. Lastly, arbitrary suggests a decision or selection made without any logical reasoning or basis. Each of these synonyms can be used interchangeably with unselective to describe the same concept.