?, (Arabic letter gueh (U+06B3)), is an additional letter of the Arabic script, not used in the Arabic alphabet itself but used in Sindhi and Saraiki to represent a voiced velar implosive, . It is written as ? in Saraiki and Sindhi's Devanagari orthography
The velar nasal is a type of consonantal sound, used in Sindhi and Saraiki language and other some spoken languages. It is compound of '?' and '?'. It is the sound of ng in English sing. The symbol in the International Phonetic Alphabet that represents this sound is ⟨?⟩, and the equivalent X-SAMPA symbol is N. The IPA symbol ⟨?⟩ is similar to ⟨?⟩, the symbol for the retroflex nasal, which has a rightward-pointing hook extending from the bottom of the right stem, and to ⟨?⟩, the symbol for the palatal nasal, which has a leftward-pointing hook extending from the bottom of the left stem. Both the IPA symbol and the sound are commonly called 'eng' or 'engma'.
The Arabic letter Gueh, or ?, has 4 forms in total. They are:
|Position in word:||Isolated||Final||Medial||Initial|