View Message

I don't know this particular name, but it is likely to be prenasalized stop /ⁿg/. It is the probably close to the sound in English finger, except in English, this combination doesn't appear syllable initially. So, one could start by realizing that one can keep humming a nasal like nnnnnnn without any other vowel, then think of saying nnnnnnguyen, and then shortening the initial sequence down so that the ng takes roughly the same time as a g would in that position.