The correct spelling of the word "soltis" is actually "solstice". The pronunciation of this word in IPA phonetic transcription is [ˈsɒlstɪs]. The first syllable "sol" is pronounced like "soul", while the second syllable "stice" rhymes with "missed". The word refers to either of the two points in the year when the sun reaches its highest or lowest point in the sky, marking the beginning of summer or winter. It is a significant event in many cultures and is celebrated worldwide.