Long s - Wikipedia
https://en.m.wikipedia.org/wiki/Long_s
WebThe long s ſ , also known as the medial s or initial s, is an archaic form of the lowercase letter s . It replaced the single s , or one or both [a] of the letters s in a "double s " sequence (e.g., "ſinfulneſs" for "sinfulness" and "poſſeſs" or "poſseſs" for "possess", but never * "poſſeſſ"). [1]
DA: 23 PA: 14 MOZ Rank: 25