U+1EF1 "ự" Latin Small Letter U with Horn and Dot Below Unicode Character

U+1EF1 "ự" Latin Small Letter U with Horn and Dot Below is a specialized glyph used in the Vietnamese alphabet to represent a distinct vowel sound. It is formed by adding a horn (a small hook attached to the top right of the letter) and a dot below the standard letter U, which together indicate a specific tonal and phonetic quality in the Vietnamese language. This character is part of the Latin Extended Additional block and is primarily employed in the writing of Vietnamese, where it appears in words that require the combination of the "U with horn" vowel and the low, heavy tone marked by the dot below.