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O is the fifteenth letter of the modern Latin alphabet. Its name in English is spelled o (IPA ), plural oes.
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(o-grave) is a letter of Kashubian language. This letter also appears in Catalan, Italian, Occitan, Scottish Gaelic, and Vietnamese language as a variant of letter “o”.
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(o-acute) is a letter in the Faroese, Hungarian, Icelandic, Kashubian, Polish, Czech, Slovak, and Sorbian languages. This letter also appears in the Catalan, Irish, Occitan, Portuguese, Spanish. and Vietnamese languages as a variant of letter “o”. It is also used in English for other purposes.
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Not to be confused with Ő, O with double acute. "Õ", or "õ" is a composition of the Latin letter O with the diacritic mark tilde.The HTML entity is Õ for Õ and õ for õ.
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"Ö", or "ö", is a character used in several extended Latin alphabets, or the letter O with umlaut or diaeresis.
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Ơ is one of the 12 Vietnamese language vowels. It is pronounced like an unrounded o.This symbol does not exist in many fonts, and isn't included on any keyboards, so it is often written as either o+ or o*. The VIQR standard is o+.Because Vietnamese is a tonal language this letter may optionally have any one of the 5 tonal symbols above or below it.
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The circumflex (ˆ) (often also called a "caret", from a non-diacritical sign with similar shape (^); also "hat" or "uppen") is a diacritic mark used in written Greek, French, Frisian, Esperanto,  Norwegian, Romanian, Slovak, Vietnamese, Romanized Japanese, Welsh, Portuguese, Italian, Afrikaans, Turkish and other languages. It received its English name from Latin circumflexus (bent about)—a translation of the Greek περισπωμένη (perispomeni).
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The double acute accent ( ˝ ) is a diacritic mark of the Latin script used primarily in written Hungarian. Consequently, it is also known as Hungarumlaut. The signs formed with diacritic marks count as letters of their own right in the Hungarian alphabet.
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A portmanteau of emotion and icon, an emoticon is a symbol or combination of symbols used to convey emotional content in written or message form. Some examples of text-based emoticons include: :-) :-( ;-)
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relating to

about

one
a
an
(folosită ca invocaţie) = o!
(exprimând mirare, bucurie) = o!
(exprimând mirare, bucurie) = oh!
(exprimând mirare, bucurie) = o (dear) me!
(exprimând mirare, bucurie) = o my!
(vai de mine) = woe me!
her (fem.)
it (neutru)
him (masc.)
pop. shall
pop. will
pop. 'llam văzut-o = I saw her
am s-o fac de îndată = I shall do it at once