Denshi Jisho — Online Japanese dictionary

着々 ちゃくちゃく steadily
Common word, Adverb, Adverb taking the 'to' particle 

You can also

Look up kanji details for 着々.

Try a Yahoo Jisho search for 着々 .
Try a Goo Jisho search for 着々 .
Try a Google search for 着々 .