The spelling of the word "smiled up on" can be a bit tricky. The IPA phonetic transcription for this word is /smaɪld ʌp ɒn/. The "smi" in "smiled" is pronounced with a long "i" sound, while "led" has a short "e" sound. "Up" is pronounced with the "uh" sound, as in "cup", while "on" rhymes with "gone". Overall, "smiled up on" is spelled with a combination of short and long vowel sounds, which can make it difficult to remember the correct spelling.