U+035E "͞" Combining Double Macron Unicode Character

U+035E "͞" Combining Double Macron is a diacritical mark used in written language to be placed over a base letter, most commonly in linguistic and scholarly transcriptions to indicate a long vowel sound or a double-length pronunciation, such as in the Latin transcription of Ancient Greek where it marks length on the letter eta or omega. It appears as a horizontal line spanning the width of the character it modifies, and it is one of several combining macron forms in Unicode that allow for precise orthographic representation in digital text without altering the underlying base character.