fall
The word 'caer' in Spanish essentially translates to 'fall' in English. It could be used to denote the action of falling from an elevated spot or imply a drop, like leaves falling from a tree. However, its usage isn't limited to physical falling only. It also expresses metaphorical falls such as falling ill or failing in some aspect.
I hope I don't fall.
In this sentence, 'caer' is used to express the action of falling. It's a common phrase used when someone is worried about potentially falling or slipping.
I'm going to succumb to the temptation of eating the cake.
In this context, 'caer' is used in the figurative sense of succumbing to temptation. This usage is common when speaking about temptation towards something, in this case, eating cake.
Do you think it's going to rain today?
In this example, 'caer' is used to mean 'to fall' in reference to the rain. It is similar to saying 'falling rain' in English and is a common way to ask if it will rain.