This is the 3485th most frequent Dutch word.
omvallen
"Omvallen" means "to fall over" or "to topple."
In this sentence, 'omvallen' is used to describe the act of tipping over or falling, relating to the tree that might fall due to external forces like a storm.
De boom dreigde om te vallen tijdens de storm.
The tree threatened to fall over during the storm.
Here, 'omvallen' is presented in the context of causing something to fall over, warning someone to avoid an action that might lead to it happening.
Pas op dat je die vaas niet om laat vallen!
Be careful not to knock over that vase!
In this usage, 'omvallen' conveys the idea of a person collapsing or physically falling down due to exhaustion or other pressures.