Thehamza is often romanized as a typewriter apostophe ('), a modifier letter apostrophe (ʼ), a modifier letter right half ring (ʾ), or as the International Phonetic Alphabet symbol ʔ. In Arabizi, it is either written as "2" or not written at all.
This form has been proposed for the inclusion to the Unicode Standard,[4][5] but the Unicode Script Ad Hoc Group stated that it can be unified with the existing .mw-parser-output .monospacedfont-family:monospace,monospaceU+0674 ٴ ARABIC LETTER HIGH HAMZA.[6] The form above currently being displayed using a standard Arabic Hamza with an altered vertical position.
In the Jawi alphabet (Arabic script used to write Malay), hamza is used for various purposes, but is rarely used to denote a glottal stop except in certain Arabic loanwords. The default isolated hamza form (Malay: hamzah setara) is the second least common form of hamza,[5] whereas another form unique to the Jawi script, the three-quarter high hamza (Malay: hamzah tiga suku) is most commonly used in daily Jawi writing. The three-quarter high hamza itself is used in many cases:[7]
This exact form is not available in Unicode Standard, as it is unified with ARABIC LETTER HIGH HAMZA, but the common way of writing this form is by using a normal hamza and altering its vertical position.
In the Urdu alphabet, hamza does not occur at the initial position over alif since alif is not used as a glottal stop in Urdu. In the middle position, if hamza is surrounded by vowels, it indicates a diphthong or syllable break between the two vowels. In the middle position, if hamza is surrounded by only one vowel, it takes the sound of that vowel. In the final position hamza is silent or produces a glottal sound, as in Arabic.
Hamza is also added at the last letter of the first word of ezāfe compound to represent -e- if the first word ends with yeh or with he or over bari yeh if it is added at the end of the first word of the ezāfe compound.
Hamza is always written on the line in the middle position unless in waw if that letter is preceded by a non-joiner letter; then, it is seated above waw. Hamza is also seated when written above baṛi yeh. In the final form, Hamza is written in its full form. In ezāfe, hamza is seated above choṭi he, yeh or baṛi yeh of the first word to represent the -e- of ezāfe compound.
In the Uyghur Arabic alphabet, the hamza is not a distinct letter and is not generally used to denote the glottal stop, but rather to indicate vowels. The hamza is only depicted with vowels in their initial or isolated forms, and only then when the vowel starts a word. It is also occasionally used when a word has two vowels in a row.[9]
The Kashmiri language written in Arabic script includes the diacritic or "wavy hamza". In Kashmiri the diacritic is called āmāl mad when used above alif: ٲ to create the vowel /əː/.[11] Kashmiri calls the wavy hamza sāȳ when below the alif: اٟ to create the sound /ɨː/.[12]
For example, if you want to find a word that begins with alef and specify match alef hamza, then the word will not be matched if it begins with alef hamza above, alef hamza below, or alef madda. If it is specified, you must enter the correct form of alef for a match.
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