Beginning

Although the verb 'to begin' has only one '-n-', the noun beginning has two in the second syllable - as well as a third in the third syllable.

For a note on the inflections of 'to begin', go to Begin (irregular verb).

This is one of the 117 mis-spellings listed as 'Common difficulties' in the section on 'Spelling' within 'Writing' in UEfAP.