To fall on or upon.
To assault, attack.
The fall of the evening.
A fall of rain or snow.
A falling on or upon; an attack, onset, or assault.
To burst out or break forth.
An eruption; the sudden appearance of a rash, disease, etc.
Synonym of breakout (“escape from prison”)
An outburst or sudden eruption, especially of violence and mischief.
A sudden increase.