U+A978 "ꥸ" Hangul Choseong Ssangcieuc-Hieuh Unicode Character

U+A978 "ꥸ" Hangul Choseong Ssangcieuc-Hieuh is a rare and specialized consonant cluster from the Hangul script, representing a doubled initial sound combining "Ssangcieuc" (a fortis or tense 'j' sound) with "Hieuh" (an 'h' sound). This character is part of the Hangul Jamo Extended-A block, which was encoded to support archaic or obsolete letters used in early Korean writing, particularly for representing sounds not found in modern standard Korean. As a choseong or initial consonant, it would have been used at the beginning of a syllable in historical texts, but it is not employed in contemporary Korean orthography and is of interest primarily to linguists, historians, and digital typographers working with Old Korean manuscripts.