Despite the similarities in spelling, “debarrass” is not the opposite of “embarrass.” In the definition of the word, “disembarrass” means “to free from embarrassment, impediment, or superfluity.” The usage of “debarrass,” meanwhile, refers specifically to the removal of impediments or superfluities (extras). You might say, “I debarrassed her of her umbrella and coat once she was inside and away from the rain.” It’s a formal word, from the French “débarrasser,” of the same meaning, but it’s still useful for situations in which a great burden has been lifted.