Samekh

Samekh or samech is the fifteenth letter of the Semitic abjads, including Phoeniciansāmek 𐤎, Hebrewsāmeḵס, Aramaicsamek 𐡎, and Syriacsemkaṯ ܣ. Samekh is the only letter of the Semitic abjad that has no surviving descendant in the Arabic alphabet; however, it was present in the Nabataean alphabet, the Arabic alphabet's immediate predecessor, as the letter simkath𐢖‎, which was related to the Ancient North Arabian 𐪏‎‎‎ and South Arabian𐩯. The numerical value of samekh is 60.

Samekh represents a voiceless alveolar fricative/s/. In the Hebrew language, the samekh ס has the same pronunciation as the left-dotted shinשׂ.

In Arabic, samekh is replaced by the letter sīn (س, /s/) which is the 15th letter in the common Abjadi order, and the 12th letter in the Hija'i order, it has the same numerical (abjad) value of 60 in the common Abjadi order.