This is the 3729th most frequent Japanese word.
こぼれ
"こぼれ" means "spillage" or "overflow."
This sentence uses "こぼれ" in the context of something liquid spilling or overflowing naturally.
涙がこぼれた。
Tears spilled over.
The usage here indicates an unintended spilling of a liquid substance.
机の上にジュースがこぼれてしまった。
Juice spilled on the table.
In this sentence, "こぼれ" is used metaphorically to describe an emotion overflowing.