For example, the 'কার' form of আ is called 'আ-কার' (a-kar, /a kar/). This diacritical form is called 'কার' (kar, /kar/) form of the following vowel in Bengali. An abugida differs from an alphabet by the fact that in an abugida, any vowel following a consonant is written as an diacritic appended with the preceding consonant. It is worthwhile to note that the Bengali script is an 'Abugida', not an 'Alphabet'. Vowel Diacritics in Bengali Addition of Bengali consonant Kô with the diacritical forms of Bengali vowels.