Describing something that is not predetermined; done or arranged in a way that lacks a specific pattern or purpose.

अनियमित

English Usage: The participants were randomly assigned to either the control group or the experimental group.

Hindi Usage: प्रतिभागियों को अनियमित रूप से नियंत्रण समूह या प्रयोगात्मक समूह में रखा गया।