10 letters · 12 points in Scrabble
noun a sister who has only one parent in common with you
originEtymology tree Proto-Indo-European *(s)tew- Proto-Germanic *steupa- Proto-West Germanic *steupa- Old English stēop- Middle English step- English step- Proto-Indo-European *swé Proto-Indo-European *h₁ésh₂r̥ Proto-Indo-European *su-h₁ésh₂-ōr? Proto-Indo-European *swé Proto-Indo-European *-sōr ? Proto-Indo-European *swésōrder. Proto-Germanic *swestēr Proto-West Germanic *swester Old English sweostor…
Etymology from Wiktionary, CC BY-SA 3.0