The pronunciation of "r" is very difficult for some asians, especially r in the middle of a word such as " murder". In Standard British English the "r" at the end of a syllable isn't pronounced. This type of

It's an elliptical definition. I read Ross's line as meaning "(the vowel contained in) cot, bother...". That's still meaningless. There is no vowel that is contained in every rendition of "cot". The vowels that may