The word "unce" may be spelled with the IPA phonetic transcription /ʌns/. The "u" in this case is pronounced as the short "u" sound, similar to the "u" in "hut". The "n" is pronounced as in the word "night", and the "s" is pronounced as the voiceless "s" sound, like in "sea". Overall, the word "unce" has an unusual spelling, but its pronunciation is straightforward once the IPA transcription is understood.