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Nirmal,

Sorry, but the Latin Extended A set only offers the overbar characters for the vowels: a, e, I, o and u, not for consonants, which the questioner specifically requested. Kind regards,
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Hello,

The WikiHow site offers a way to do this in Microsoft Word at the following link:

http://www.wikihow.com/Overline-Characters-in-Microsoft-Word

For example to "overline" the character...