The word "most backnumber" may seem confusing at first glance, but it is actually quite simple once you understand its spelling. "Most" is pronounced as /moʊst/ (mohst) and means "the majority of something." "Backnumber" is pronounced as /ˈbækˌnʌmbər/ (back-nuhm-bur) and refers to a previous year's issue of a publication. Together, "most backnumber" means the majority of past issues. Remember that the "b" in "backnumber" is pronounced, unlike in the word "backpack" where it is silent.