Fetching details from the dictionary...

tear; tears; lachrymal secretion
sympathy
感動して泪が止まらなくなった。
I was so moved that I could not stop the tears.
別れの時に泪を流す友人を見送った。
I saw off my friend who was in tears at our parting.
悔しくて泪がこぼれそうになった。
I was so frustrated that tears nearly spilled over.