Romanisation of a language written in a non-Roman script can be based on either transliteration (orthographically accurate and the original spelling can be recovered) or transcription (phonetically accurate, and the pronunciation can be reproduced). The distinction is important in Bengali, as its orthography was adopted from Sanskrit and ignores several millennia of sound change. All writing systems differ at least slightly from the way the language is pronounced, but this is more extreme for languages like Bengali. For example, the three letters ?, ?, and ? had distinct pronunciations in Sanskrit, but over several centuries, the standard pronunciation of Bengali (usually modelled on the Nadia dialect) has lost the phonetic distinctions, and all three are usually pronounced as IPA [??]. The spelling distinction persists in orthography. In written texts, distinguishing between homophones, such as ??? shap "curse" and ??? shap "snake", is easy. Such a distinction could be particularly relevant in searching for the term in an encyclopaedia, for example. However, the fact that the words sound identical means that they would be transcribed identically, so some important distinctions of meaning cannot be rendered by transcription. Another issue with transcription systems is that cross-dialectal and cross-register differences are widespread, so the same word or lexeme may have many different transcriptions. Even simple words like ?? "mind" may be pronounced "mon", "môn", or (in poetry) "mônô" (as in the Indian national anthem, "Jana Gana Mana"). Often, different phonemes are represented by the same symbol or grapheme. Thus, the vowel ? can represent either [e] (?? elo [el?] "came") or [?] (?? êk [?k] "one"). Occasionally, words written in the same way (homographs) may have different pronunciations for differing meanings: ?? can mean "opinion" (pronounced môt), or "similar to" (môtô). Therefore, some important phonemic distinctions cannot be rendered in a transliteration model. In addition, to represent a Bengali word to allow speakers of other languages to pronounce it easily, it may be better to use a transcription, which does not include the silent letters and other idiosyncrasies (????????? sbasthyô, spelled , or ?????? ôggên, spelled ) that make Bengali romanisation so complicated. Such letters are misleading in a phonetic romanisation of Bengali and are a result of often inclusion of the Bengali script with other Indic scripts for romanisation, but the other Indic scripts lack the inherent vowel ô, which causes chaos for Bengali romanisation.