অর্থ : Establish the validity of something, as by an example, explanation or experiment.
							উদাহরণ : 
							The experiment demonstrated the instability of the compound.
							The mathematician showed the validity of the conjecture.
							
অর্থ : Provide evidence for. Stand as proof of. Show by one's behavior, attitude, or external attributes.
							উদাহরণ : 
							His high fever attested to his illness.
							The buildings in Rome manifest a high level of architectural sophistication.
							This decision demonstrates his sense of fairness.
							
অর্থ : March in protest. Take part in a demonstration.
							উদাহরণ : 
							Thousands demonstrated against globalization during the meeting of the most powerful economic nations in Seattle.
							
সমার্থক : march