Vowels

The script presently has a total of 11 vowel letters, used to represent the eight main vowel sounds of Assamese, along with a number of vowel diphthongs. All of these are used in both Assamese and Bengali, the two main languages using the script. In addition to the vowel system in the Bengali alphabet the Assamese alphabet has an additional "matra" (ʼ) that is used to represent the phonemes অʼ and এʼ. Some of the vowel letters have different sounds depending on the word, and a number of vowel distinctions preserved in the writing system are not pronounced as such in modern spoken Assamese or Bengali. For example, the Assamese script has two symbols for the vowel sound [i] and two symbols for the vowel sound [u]. This redundancy stems from the time when this script was used to write Sanskrit, a language that had a short [i] and a long [iː], and a short [u] and a long [uː]. These letters are preserved in the Assamese script with their traditional names of hôrswô i (lit. 'short i') and dirghô i (lit. 'long i'), etc., despite the fact that they are no longer pronounced differently in ordinary speech.

Vowel signs can be used in conjunction with consonants to modify the pronunciation of the consonant (here exemplified by ক, kô). When no vowel is written, the vowel অ (ô or o) is often assumed. To specifically denote the absence of a vowel, (্) may be written underneath the consonant.

Consonants

The names of the consonant letters in Assamese are typically just the consonant's main pronunciation plus the inherent vowel ô. Since the inherent vowel is assumed and not written, most letters' names look identical to the letter itself (e.g. the name of the letter ঘ is itself ঘ ghô). Some letters that have lost their distinctive pronunciation in Modern Assamese are called by a more elaborate name. For example, since the consonant phoneme /n/ can be written ন, ণ, or ঞ (depending on the spelling of the particular word), these letters are not simply called no; instead, they are called ন dontyo no ("dental n"), ণ murdhoinnyo no ("retroflex n"), and ঞ inyo. Similarly, the phoneme /x/ can be written as শ taloibbyo xo ("palatal x"), ষ murdhoinnyo xo ("retroflex x"), or স dontyo xo ("dental x"), the phoneme /s/ can be written using চ prothom sô ("first s") or ছ dwitio so ("second s"), and the phoneme /z/ can be written using জ borgio zo ("row z" = "the z included in the five rows of stop consonants") or য ontohstho zo ("z situated between" = "the z that comes between the five rows of stop consonants and the row of sibilants"), depending on the standard spelling of the particular word.

Assamese or Asamiya consonants include thirty three pure consonant letters in Assamese alphabet and each letter represents a single sound with an inherent vowel, the short vowel /a /.

The first twenty-five consonants letters are called sporxo borno. These sporxo bornos are again divided into five borgos. Therefore, these twenty-five letters are also called borgio borno.

The Assamese consonants are typically just the consonant's main pronunciation plus the inherent vowel o. The inherent vowel is assumed and not written, thus, names of most letters look identical to the letter itself (e.g. the name of the letter ঘ is itself ঘ gho).

Some letters have lost their distinctive pronunciation in modern Assamese are called by a more elaborate name. For example, since the consonant phoneme /n/ can be written ন, ণ, or ঞ (depending on the spelling of the particular word), these letters are not simply called no; instead, they are called ন dointo no ("dental n"), ণ murdhoinyo no ("cerebral n"), and ঞ nio.

Similarly, the phoneme /x/ can be written as শ taloibyo xo ("palatal x"), ষ murdhonno xo ("cerebral x"), or স dointo xo ("dental x"), the phoneme /s/ can be written using চ prothom so ("first s") or ছ dwitio so ("second s"), and the phoneme /z/ can be written using জ borgio zo ("row z" = "the z included in the five rows of stop consonants") or য ontohstho zo ("z situated between" = "the z that comes between the five rows of stop consonants and the row of sibilants"), depending on the standard spelling of the particular word.

The consonants can be arranged in following groups:

Group: 1 – Gutturals

Group: 2 – Palatals

Group: 3 – Cerebrals or Retroflex

Group: 4 – Dentals

Group: 5 – Labials

Group: 6 – Semivowels

Group: 7 – Sibilants

Group: 8 – Aspirate

Group: 9 – Anuxāra

Group: 9 – Bixarga

Group: 10 – Chandrabindu (anunāsika)

• The letters শ (talôibyo xô), ষ (murdhôinyo xô), স (dôntyo xô) and হ (hô) are called usma barna
• The letters য (za), ৰ (ra), ল (la) and ৱ (wa) are called ôntôhsthô barna
• The letters ড় (daré ṛa) and ঢ় (dharé ṛha) are phonetically similar to /ra/
• The letter য (ôntôhsthô zô) is articulated like 'ôntôhsthô yô' in the word medial and final position. To denote the ôntôhsthô ẏô, the letter য় (ôntôhsthô ẏô) is used in Assamese
• ৎ (khanda ṯ or hôsôntô t) means the consonant letter Tö (dôntyo ta) without the inherent vowel

Consonant clusters according to Goswami

According to G. C. Goswami, the number of two-phoneme clusters is 143 symbolised by 174 conjunct letters. Three phoneme clusters are 21 in number, which are written by 27 conjunct clusters. A few of them are given hereafter as examples:

Digits