Tears Of Gratitude
noun
The feeling of teardrops is a feeling that makes you cry. But, it's not a bad feeling, these are tears of gratitude.
かんるい
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
どんな時に人は感涙にむせび泣くと思いますか。
When do you think people would burst into tears of gratitude?