嗯 ⇒
嗯 ēn/èn/en, (a groaning sound), (nonverbal grunt as interjection)/OK, yeah/what?, interjecti...
哼 ⇒
哼 hēng, to groan/to snort/to hum/to croon/humph!
哼哼 哼唱 hēngchàng, to hum/to croon
哼哼哈哈 哼唧 hēngji, whisper
气哼哼 qìhēnghēng, [氣哼哼], enraged/furious/livid