Da (Mongolic)

Da is a letter of related and vertically oriented alphabets used to write Mongolic and Tungusic languages.

Mongolian language

 * Transcribes Chakhar ; Khalkha, and .  Transliterated into Cyrillic with the letter.
 * Syllable-initially indistinguishable from '.  When it must be distinguished from ' medially, it can be written twice, and with both medial forms (as in  ' 'well', compared with  ' 'holy').  Alternatively, a dot is sometimes used to the right of the letter in 19th and 20th century manuscripts.
 * The belly-tooth-shaped form is used before consonants (syllable-final), the other before vowels.
 * Derived from Old Uyghur taw (𐾀; initial, belly-tooth-shaped medial, and final) and lamedh (𐽸; other medial form).
 * Positional variants of lamedh $⟨?⟩$ can be used to clarify the spelling of ' in words of foreign origin, as in ' 'doctor' (доктор '),  ' 'the following, the succeding' (дэд '), and  ' 'goods, property' (distinguishing it from  ' 'year', and retained in derivatives such as $⟨Mongolian letter Da (medial form-2).svg⟩$ ' 'possession' (эдлэл '); эд ').
 * Produced with D using the Windows Mongolian keyboard layout.
 * In the Mongolian Unicode block, ' comes after ' and before .