Fonner is a rare word that refers to someone who is an enemy or adversary. The spelling of the word can be a bit confusing because the "o" and "n" are pronounced differently than they are in other words. The "o" is pronounced like the "a" in "father" and the "n" is pronounced like the "ng" in "sing". Therefore, the IPA transcription for "fonner" is /ˈfɑnər/. While not a commonly used word, it is an important one to know for those studying English vocabulary.