Meaning of ēn:
嗯
(a groaning sound)
Tā zài kǎolǜ dá'àn shí fāchū ēn shēng.
他在考虑答案时发出嗯声。
He made a groaning sound while considering the answer.
(nonverbal grunt as interjection); OK, yeah; what?; interjection indicating approval, appreciation or agreement
Tā xiǎng zhe xiǎng zhe, tūrán fāchū yī shēng en.
他想着想着,突然发出一声嗯。
He was lost in thought and suddenly let out a grunt.
Wǒ wèn tā shìfǒu yuànyì qù, tā shuō “èn, dāngrán le”.
我问她是否愿意去,她说“嗯,当然了”。
I asked her if she wanted to go, and she said, 'Yeah, of course.'
Tā tīngdào wèntí hòu huídále yī shēng 'èn'.
他听到问题后回答了一声“嗯”。
He replied 'what?' after hearing the question.
Tā wèn wǒ shìfǒu yào cānjiā, wǒ shuō “Ēn, hǎo de!”
他问我是否要参加,我说“嗯,好的!”
He asked me if I wanted to participate, and I said, "Yes, alright!"