What it means

1. verb criticize or reprimand harshly
   “The critics came down hard on the new play”
2. verb get sick
   “She fell sick last Friday, and now she is in the hospital”
3. verb be the essential element
   “The proposal boils down to a compromise”
4. verb fall from clouds
   “rain, snow and sleet were falling”
5. verb move downward and lower, but not necessarily all the way
   “The temperature is going down”