Denshi Jisho — Online Japanese dictionary

躊躇う ためらう to hesitate
Common word, Godan verb with u ending, Intransitive verb, Usually written using kana alone 

You can also

Look up kanji details for 躊躇う.

Try a Yahoo Jisho search for 躊躇う .
Try a Goo Jisho search for 躊躇う .
Try a Google search for 躊躇う .