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Anusvara (Devanagari: अनुस्वार anusvāra) is the diacritic used to mark a type of nasalization used in a number of Indic languages. Depending on the location of the anusvara in the word and the language within which it is used, its exact pronunciation can vary greatly.
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In the Devanagari script, anusvara is represented with a dot (bindu) above the letter (मं). In IAST, the corresponding symbol is ṃ (m with an underdot). Some transcriptions render notation of phonetic variants used in some Vedic shakhas with variant transcription (ṁ).
In Vedic Sanskrit, the anusvāra (lit. "after-sound") is a sound that occurs as an allophone of /m/ – at a morpheme boundary, or /n/ – morpheme-internally, if they are preceded by a vowel and followed by a fricative (/ś/, /ṣ/, /s/ or /h/).[1] Descriptions of this sound in the different ancient phonetic treatises might suggest either a type of nasalization (different from the anunāsika) and lengthening of the preceding vowel, or a consonantal segment, such as a nasal fricative homorganic (i.e. sharing the same place of articulation) to the following consonant. The discrepancies have been attributed either to differences of analysis of the same pronunciation,[2] or to differences due to dialectal or diachronic variation.[3] In the later language the anusvāra began to be used before /r/ under certain conditions, and in Classical Sanskrit its use had extended before /l/ and /y/, replacing earlier [l̃] and [ỹ].[1] It further began to be used instead of the homorganic nasal before a stop: Pāṇini gave such an optional use in sandhi word-finally, while later treatises prescribed it also at morpheme junctions and in intra-morphemic position.[4]
In Standard Hindi, the anusvāra is traditionally defined as representing a nasal consonant homorganic to a following stop, in contrast to the candrabindu (anunāsika), which indicates vowel nasalization. In practice, however, the two are often used interchangeably. The precise phonetic value of the phoneme, whether represented by anusvāra or candrabindu, is dependent on the phonological environment.[5] Word-finally it is realized as nasalization of the preceding vowel (e.g. kuāṃ [kʊ̃ãː], "a well"). It results in vowel nasalization also medially between a short vowel and a non-obstruent (kuṃvar [kʊ̃ʋər] "a youth", gaṃṛāsā [ɡə̃ɽaːsaː] "a long-handled axe"), and, in native words, between a long vowel and a voiceless stop (dāṃt [dãːt] "tooth", sāṃp [sãːp] "a snake", pūṃch [pũːtʃʰ] "tail"). It is pronounced as a homorganic nasal, with the preceding vowel becoming nasalized allophonically, in the following cases: between a long vowel and a voiced stop (tāṃbā [taːmbaː] "copper", cāṃdī [tʃaːndiː] "silver"), between a long vowel and a voiceless stop in loanwords (dāṃt [daːnt] "repressed", baiṃk [bæːŋk] "a bank", khazāṃcī [kʰəzaːɲtʃiː]), and also between a short vowel and an obstruent (saṃbhāl- [səmbʱaːl] "to support", saṃdūk [sənduːk] "a chest"). The last rule has two sets of exceptions where the anusvāra effects only a nasalization of the preceding short vowel. Words from the first set are morphologically derived from words with a long nasalized vowel (baṃṭ- [bə̃ʈ], "to be divided" from bāṃṭ- [bãʈ], "to divide"; siṃcāī [sɪ̃tʃai], "irrigation" from sīṃc- [sĩːtʃ], "to irrigate"). In suchs cases the vowel is sometimes denasalized ([bəʈ], [sɪtʃai] instead of [bə̃ʈ-], [sɪ̃tʃai]). The second set is composed of a few words like (pahuṃc- [pahʊ̃tʃ], "to arrive" and haṃs- [hə̃s], "to laugh").[note 1]
In Nepali, chandrabindu and anusvara have the same pronunciation similarly to Hindi. However, as Nepali spelling usage is largely unstandardised, there is a great deal of variation regarding which occurs in any given position. So many words containing anusvara have alternative spellings with chandrabindu instead of anusvara and vice versa.
Anusvara is used in other languages using Indic scripts as well, usually to represent suprasegmental phones (such as phonation type or nasalization), or for other nasal sounds.
In the Bengali script, the anusvara diacritic (অনুস্বার onushshar in Bengali) is written as a circle above a slanted line (ং), and represents /ŋ/. It is used in the name of the Bengali language বাংলা [baŋla]. It has merged in pronunciation with the letter ঙ ungô in Bengali. Although the anusvara is a consonant in Bengali phonology, it is nevertheless treated in the written system as a diacritic in that it is always directly adjacent to the preceding consonant, even when spacing consonants apart in titles or banners (e.g. বাং-লা-দে-শ bang-la-de-sh, not বা-ং-লা-দে-শ ba-ng-la-de-sh for বাংলাদেশ Bangladesh), it is never pronounced with the inherent vowel "ô", and it cannot take a vowel sign (instead, the consonant ঙ ungô is used pre-vocalically).
In the Burmese script, the anusvara (အောက်မြစ် auk myit IPA: [auʔ mjɪʔ]) is represented as a dot underneath a nasalised final to indicate a creaky tone (with a shortened vowel). Burmese also uses a dot above to indicate the /-ɴ/ nasalized ending (called "Myanmar Sign Anusvara" in Unicode), called သေးသေးတင် thay thay tin (IPA: [θé ðé tɪ̀ɴ])
In the Sinhala script, the anusvara is not a diacritic but an independent grapheme. It has circular shape (ං), which is why it is called binduva in Sinhala, which means ´dot´. The anusvara represents /ŋ/ at the end of a syllable. It is used in the name of the Sinhala language සිංහල. It has merged in pronunciation with the letter ඞ ṅa in Sinhala.
The Telugu script has full-Zero(anusvāra) ం , half-zero (arthanusvāra) and Visarga to convey various shades of nasal sounds. Anusvara is represented as clircle shape after a letter.[6]
Ex: క - Ka and కం - Kam
Anunasika (anunāsika) is a form of vowel nasalization, often represented by an anusvara. It is a form of open mouthed nasalization akin to the nasalization of vowels followed by "n" or "m" in Parisian French. When "n" or "m" follow a vowel, the "n" or "m" becomes silent and causes the preceding vowel to become nasal (i.e. pronounced with the soft palate extended downward so as to allow part or all of the air to leave through the nostrils). Anunasika is sometimes called a subdot because of its IAST representation.
In Devanagari and related orthographies it is represented by the chandrabindu diacritic (example: मँ ).
In Burmese, the anunasika, called သေးသေးတင် (IPA: [θé ðé tɪ̀ɴ]) and represented as (ံ) creates the /-ɴ/ nasalized ending, when attached as a dot above a letter. The anunasika represents the -m final in Pali.
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