- [etymonline][1] is a great resource for looking up specific words.

- If you are at a university, you might have [OED][2] access, which is the most in-depth and hardcore etymology resource, if you have it.

- [Take Our Word For It][3] is a fun website for browsing through and learning about etymologies in a more entertaining, less structured way. 


  [1]: http://etymonline.com/
  [2]: http://oed.com
  [3]: http://takeourword.com/