Denshi Jisho — Online Japanese dictionary

加える くわえる to append; to sum up; to add (up); to include; to increase; to inflict
Common word, Ichidan verb, Transitive verb 

You can also

Look up kanji details for 加える.

Try a Yahoo Jisho search for 加える .
Try a Goo Jisho search for 加える .
Try a Google search for 加える .