[Bermudagirl]

This problem may have been dealt with elsewhere, but it was very difficult to do a search for my specific query.
I have just started reading a book on my Kobo Touch but I have noticed in a number of cases, it splits words where they shouldn't be. For instance - the word "screeched" has screech on one line and the ed on the next.
In another example the word "down" has been split between two lines - the letter d on one line and the own on the next.
Finally the name "Lucy" is split - the L on one line and the ucy on the next.
Is there a way to stop this happening?
I've checked how the book looks in both Calibre and Sigil and it looks fine, so I'm not sure how to sort this problem.
Any help would be much appreciated!