How Do You Spell F SISTER?
Pronunciation: [ˈɛf sˈɪstə] (IPA) 
The correct spelling of the word "f sister" is "half-sister". This compound word consists of two parts, "half" and "sister", and is pronounced /hæf ˈsɪstər/ in IPA phonetic transcription. The "h" in "half" is silent, and the vowel sound in "half" is the short "a" as in "cat". The stress is on the first syllable "half" and the "s" in "sister" is pronounced as a voiced consonant /z/. Overall, the pronunciation of "half-sister" is straightforward and easy to remember.
