The spelling of the word "in decorums" can be a bit confusing. The correct spelling is actually "indecorum" (ɪnˈdɛkərəm). This word refers to behavior that is inappropriate or offensive, often in a social or formal setting. The prefix "in-" means "not," while the root word "decorum" (ˈdɛkərəm) means proper behavior or etiquette. So, when someone displays "indecorum," they are not behaving in a socially acceptable way. It's important to get the spelling right so you can effectively communicate your message.
The term "in decorums" does not have a clear etymology. In decorums is not a widely recognized word or phrase in the English language. It seems to be a combination of the prefix "in", meaning "not" or "without", and the word "decorum", which refers to behavior or conduct in accordance with social norms and expectations. However, this combination is not standard or commonly used, and it is possible that it may be a misspelling or a construction specific to a particular context or author.