U+0BCB "ோ" Tamil Vowel Sign Oo Unicode Character

U+0BCB "ோ" Tamil Vowel Sign Oo is a combining diacritical mark used in the Tamil script, representing the long vowel sound "oo" as in the word "school." It is written as a visible mark that typically appears above the consonant it modifies, transforming the inherent vowel sound of that consonant from a short "a" to the longer "oo." This character is part of the Tamil block in Unicode and is essential for accurately writing many standard Tamil words, where it combines with base consonants to form syllables like கோ (koo) or பூ (poo).