What ̹ means
It marks a sound made with extra lip rounding.
The IPA's 1926 chart describes the instruction as “lips more rounded.” An annotated symbol list cites IPA sources beginning in 1949 for the subscript half-ring form. The International Phonetic Association developed the IPA to describe pronunciation and support teaching; this mark adds a fine-grained instruction to that system.
Why does the mark move or disappear?
The base letter and font decide where this mark lands.
Put the base first, then the mark; a nonspacing mark has no advance width of its own. With no base, it may appear on a dotted circle. A font without suitable positioning can place it awkwardly or make it hard to see. The dotted circle is a display placeholder, not part of the text sequence.
Specialist IPA notation: attached to a sound symbol, it specifies a more-rounded pronunciation.
Alone, it may look like an unattached mark rather than a complete phonetic notation.
Don't confuse it with
2Combination ideas
2Questions people ask
1Why does this combining mark show a dotted circle?
A dotted circle is a display placeholder that can show where an unattached mark belongs. It is not part of the text sequence; with a base present, the mark attaches to that character.
How to type ̹
̹\0339Codes and encoding1 code points
A visible symbol can contain several code points. JS .length counts UTF-16 units; UTF-8 counts bytes.
