[Provalitsya]
"to fail, to collapse, to fall through" is Провалиться in Russian.
Провалиться means "to fail, to collapse, to fall through" in English.
Listen to the pronunciationWord #3573 of 6,000 by frequency in Russian.
Лёд треснул, и мальчик чуть не провалился под воду.
The ice cracked and the boy almost fell through into the water.