GIVE ANSWERS - English

Fall + certain prepositions has myriad meanings...

Fall in (gather/assemble)
Fall out (dissemble/relax/recess)

Note: Both of the above, while having roots in military usage re; English, have become to be used widely among America's civilian (non military) as well.

And don't forget "to get the drop" on someone/something (e.g., a situation/development).

Drop a hint. (i.e., leave/offer a clue)
Fall from grace. (i.e., a decline in one's status)

Everyone has very nice explanations. Let me add it a bit. I think another difference between drop and fall is the meaning. Drop mostly means something that fall literally, and the size is usually refer to small things, at least smaller than human.

Fall is used for something bigger than human, e.g trees. Fall can also be used for something methaphorical like ’the fall of a civilization’