There seems to be several words in Esperanto that all correspond to the English verb "to share". Right now I can think of dividi, diskonigi and kunhavi. I'd love to see a collection of them all, and in which situations to use which ones.
- dividi - to divide something into smaller pieces.
- kundividi - to share those pieces with other people. (everyone gets a bit)
- havigi - to make other people have something. In other words, to give, make available, provide, etc.
- kunhavigi - To make something common property of you and other people, without dividing it into pieces.
- dividi is often used for kundividi
(Please comment for imprecisions or errors)
This question was discussed in the Facebook group Duolingo Esperanto Learners.
There was some disagreement among the fluent speakers about how far the word dividi could be pushed without being considered an anglicism.
There are certainly many examples of dividi being used with thoughts, experience, expertise, and objects that are not chopped up and parted out. Based on examples found in the Tekstaro, dividi can be used with fate, thoughts, remarks, danger, happiness, and opinions
As for "sharing" things on Facebook, the term diskonigi is in use - possibly due to Richard Delemore's use of the term in his Evildea videos. Note that different social media use different expressions for this action. Certainly dividi and reafiŝi could also work.