Trim node inside views

I have a view (Drupal 7), filled with nodes. And I got a trimmer on 200 chars on the body. But as 开发者_开发百科it happens, somethimes a word is cut in half. How do I get to trimm Drupal on words in stead of chars?

Inside the Rewrite results field options and underneath the checkbox entitled Trim this field to a maximum length make sure the checkbox entitled Trim only on a word boundary is selected.