U+1AD4 "᫔" Combining Vertical-Line-Macron Unicode Character

U+1AD4 "᫔" Combining Vertical-Line-Macron is a diacritical mark used in the Tai Viet script, where it is placed above certain base consonants to indicate a specific tonal or phonetic modification. It combines two visual features a vertical line and a macron (horizontal bar) into a single complex glyph, and as a combining character, it is designed to attach to and modify the pronunciation or meaning of a preceding character within a text. Its purpose is to enable accurate representation of the Tai Viet language's tonal system, contributing to the script's ability to convey subtle distinctions in spoken words.