1)
How does He send His word to the land?
1.
Radak: This refers to rain, which comes via His word.
2)
Why does it say "Meherah"?
1.
Radak: [It comes quickly,] like a slave who runs to do the desire of his master.
2.
Malbim: Even if sometimes He makes an evil decree on the land, the bad days do not extend; it passes quickly. Another Dibur is sent to retract the harsh saying and to nullify the decree.
3)
What is "Devaro"?
1.
Radak: It is His desire.