There's no need to worry if you've never heard of the word "sleightful" before - it's actually not a commonly used word. But if you're curious about how it's spelled, you can break it down phonetically. First, the "s" sound is represented by the IPA symbol /s/. This is followed by the "l" sound, which is spelled with the symbol /l/. Next comes a long "i" sound, similar to the "i" in "bike", represented by /aɪ/. Finally, there's the "t" sound, which is spelled with the symbol /t/. Put it all together and the correct spelling of "sleightful" is s-l-a-i-g-h-t-f-u-l.