go into vs onfall

go into

• To attack; to assault physically. 

• To divide, to be a factor of. 

• Used other than figuratively or idiomatically: see go, into. 

• To get involved in; to investigate or explore. 

onfall

• To assault, attack. 

• To fall on or upon. 

• The fall of the evening. 

• A fall of rain or snow. 

• A falling on or upon; an attack, onset, or assault.