To delete Hanja from the User Dictionary, use the following procedure.
In the Hangul field type the Hangul word associated with the Hanja in your User Dictionary.
Type Control-K to commit the Hangul input.
Click the Find button.
This displays the Hanja in the User Dictionary list area. Scroll through the list area to find the Hanja you want to delete.
Click the Hanja you want to delete.
Click the Delete button to delete the Hanja from the User Dictionary.
A delete confirmation dialog box appears.
Click OK if you are sure you want to delete the Hanja. Otherwise, click Cancel.
The line beneath the status area tells you that the word was deleted from the User Dictionary. The User Dictionary is changed. The System Dictionary is read-only and cannot be changed.