Denshi Jisho — Online Japanese dictionary

Couldn't find anything for 揺らす~, so trying 揺らす instead.

揺らす ゆらす to rock; to shake; to swing
Godan verb with su ending, Transitive verb 

You can also

Look up kanji details for 揺らす.

Try a Yahoo Jisho search for 揺らす .
Try a Goo Jisho search for 揺らす .
Try a Google search for 揺らす .