Pinyin vs. Pronunciation of 嗯? I've seen the word "嗯" many times in conversations and songs. I know that it pronounces like "hm", expressing curiosity. But when I check the pinyin of it, according to Wiktionary, it is like such:


  ńg, ń, en


which for me doesn't seem to sound like the way it pronounces. Why do they differ?

And what's more, I've never seen the pinyin like "ńg, ń", particularly for the tone mark, which should be placed on top of vowels instead of consonants. They seem to pronounce like "éng, én", which are valid nasal finals. Are those pinyin valid? If so, why it's not written as such: "éng, én"?
Very interesting question!

嗯 is pronounced as ǹg，ńg，ňg，ǹ，ń，ň. 

ńg, ń: means what？, or 什么？It expresses surprise or raise a question.

ǹg，ǹ: means I get it, I know it, or 好，我知道了

ňg，ň: means no, I don't want that, we say 嗯，不是，... 

The way to pronounce ǹ，ń，ň is that you put your tongue in the place while you pronounce the phonetic notation /n/ in English and then apply the tones. 

To pronounce ǹg，ńg，ňg , put your tongue in the place while you pronounce [ŋ] and then apply the tones. 

Of course, ǹg，ńg，ňg，ǹ，ń，ň are unusual pronunciations in Chinese.