How Do You Spell KAFF?
Pronunciation: [kˈaf] (IPA) 
The word "KAFF" is spelled with a single "F" instead of double "FF" due to the pronunciation of the word. The phonetic transcription of "KAFF" is /kaf/. In English, when a word has a single vowel followed by a consonant, the vowel sound is usually short, and the consonant is doubled when adding a suffix. However, in "KAFF," the word has no suffix and the vowel sound remains short, so there is no need to double the consonant.
