Shaddah ( , , also called by the verbal noun from the same root, tashdid تشديد ) is one of the diacritics used with the Arabic alphabet, indicating a gemination consonant. It is functionally equivalent to writing a consonant twice in the orthographies of languages like Latin, Italian language, Swedish language, and Ancient Greek, and is rendered as such in Latin script in most schemes of Arabic transliteration, e.g. رُمّان = .
0651 ّ ّ | (consonant doubled) |
For example, see the location of the diacritics on the letter ـهـ in the following words:
يَفْمُ | Above the letter |
فَمَ | Above the |
فَمَ | Below the letter |
فَمْ | Between the and the letter |
When writing Arabic by hand, it is customary first to write the and then the vowel diacritic.
In Unicode representation, the can appear either before or after the vowel diacritic, and most modern fonts can handle both options. However, in the canonical Unicode ordering the appears following the vowel diacritic, even though phonetically it should follow directly the consonantal letter.
A consonant may be long because of the form of the noun or verb; e.g., the causative form of the verb requires the second consonant of the root to be long, as in above, or by assimilation of consonants, for example the of the Arabic definite article al- assimilates to all dental consonants, e.g. (الصّبي) instead of , or through metathesis, the switching of sounds, for example أَقَلّ 'less, fewer' (instead of *أَقْلَل ), as compared to أَكْبَر 'greater'.
A syllable closed by a long consonant is made a long syllable. This affects both stress and prosody. Stress falls on the first long syllable from the end of the word, hence أَقَلّ (or, with iʻrāb, ) as opposed to أَكْبَر , مَحَبّة "love, agape" as opposed to مَعْرِفة '(experiential) knowledge'. In Arabic verse, when scanning the meter, a syllable closed by a long consonant is counted as long, just like any other syllable closed by a consonant or a syllable ending in a long vowel: أَلا تَمْدَحَنَّ 'Will you not indeed praise...?' is scanned as : short, long, long, short, long, short.
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