U+0F91 "ྑ" Tibetan Subjoined Letter Kha Unicode Character

U+0F91 "ྑ" Tibetan Subjoined Letter Kha is a combining character used in the Tibetan script to represent the subjoined form of the consonant "kha," corresponding to the sound /kʰa/. It appears as a reduced or altered variant of the standalone letter ཁ and is typically positioned below the base consonant in a Tibetan syllable stack, functioning as a medial or final component in complex orthographic clusters. This subjoined letter is employed in the transcription of Tibetan and related languages, such as Dzongkha, and follows specific rendering rules within the Unicode standard to ensure correct visual stacking and ligature formation in digital text.