ᶑ
The voiced retroflex implosive is a type of consonantal sound. Wadiyara Koli phonemically distinguishes it from the alveolar /ɗ/. Sindhi has an implosive that varies between dental and retroflex articulation, while Oromo, Saraiki and Ngad'a have /ᶑ / but not /ɗ/.[1]
The 'implicit' symbol in the International Phonetic Alphabet is ⟨ᶑ ⟩ (a D with a tail for retroflex and a hook-top for implosive).[2][3]
Features of the voiced retroflex implosive:
Symbols to the right in a cell are voiced, to the left are voiceless. Shaded areas denote articulations judged impossible.
Legend: unrounded • rounded