In the Assamese alphabet, rô (Assamese: ৰ /ɹɔ/) is the twenty-seventh consonant, or in other terms, twenty-seventh letter of the byônzônbôrnômala (ব্যঞ্জনবৰ্ণমালা).

[1][2] Rô has an inherent vowel in it, which is ô, as in most other Assamese consonants.

But, many a times, ô is to be replaced by another vowel or swôrôbôrnô.

In other words, rô-kar after a consonant means that there is a rô sound after it.

[5] For example: Some consonants change their shape when rô-kar is added.