The word "un franker" is spelled as /ʌn ˈfræŋkər/. The first syllable is pronounced as "uh" and the second syllable is pronounced as "frank" with a short "a" sound followed by "er". The word does not have a hyphen and the "f" is not capitalized. The term refers to a piece of mail that has not been stamped with a postage stamp. In order for the mail to be delivered, it must be properly franked with a valid postage stamp.