What 𞁣 means
It labels an archiphoneme, a sound category for a local merger.
Phonemes distinguish words; an archiphoneme keeps their shared features where a position erases the contrast. Here, т𞁣 labels a merger of Cyrillic т (t), ц (ts) and ч (ch), not an extra ch sound.
A Serbian dialect study used Cyrillic subscripts by 1905; the exact che appears in Russian and Polish notation from 1981 and Bulgarian phonology from 2007. A 2021 Unicode proposal argued for encoding the forms as meaningful signs, not styling.
A specialist mark in written phonology.
It labels a merger; it does not add a separate ch sound.
Don't confuse it with
4Questions people ask
1Why does 𞁣 show as a box on some devices?
Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.
How to type 𞁣
𞁣\1E063Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.