不ふ覚かくの涙なみだ

noun

tears shed in spite of oneself; involuntary tears

Used when someone cries without meaning to, often from being deeply moved or overwhelmed. The phrase implies a loss of composure.

• 感かん動どうのあまり、不ふ覚かくの涙なみだを流ながしてしまった。

  I was so moved that I shed tears in spite of myself.