"Nonback" is a compound word consisting of "non-" and "back," and is pronounced as [ˌnɑnˈbæk]. The prefix "non-" means "not," while "back" refers to the rear part of something. This word is commonly used to describe a seat or chair that doesn't have a backrest. The spelling of "nonback" is straightforward, as it combines the two words without any alterations. The use of the hyphen helps to indicate that the two words should be read together as a compound word.