U+1A48 "ᩈ" Tai Tham Letter High Sa Unicode Character

U+1A48 "ᩈ" Tai Tham Letter High Sa is a graphical symbol from the Tai Tham script block, representing a high class consonant sound in languages such as Northern Thai, Tai Lü, and Khün. This character corresponds to the voiceless alveolar fricative /s/ and is named for its high tonal register, distinguishing it from the low class equivalent in the same script. Historically rooted in the Lanna cultural tradition, it is used primarily in religious and literary texts within the Dhamma script lineage, and its encoded form in Unicode enables digital preservation and accurate rendering of these languages in modern computing environments.