Answer: demonstrate

AnswerCrossword Clue
DEMONSTRATEMarch, say
DEMONSTRATEShow
demonstrateTake part in a public demonstration
demonstrateGive a practical exhibition and explanation of (how a machine, skill, or craft works or is performed)
demonstrateto show clearly
demonstrateShow or express (a feeling or quality) by one's actions
demonstrateClearly show the existence or truth of (something) by giving proof or evidence