Sorry

Concise Oxford English Dictionary © 2008 Oxford University Press:
sorry/ˈsɒri/

▶adjective (sorrier, sorriest)

• 1 feeling distress, especially through sympathy with someone else's misfortune.

  ■ (sorry for) filled with compassion for.

• 2 feeling regret or penitence.

  ■ used to express apology.

• 3 in a poor or pitiful state.

  ■ unpleasant and regrettable.

– derivatives
sorrily adverb,
sorriness noun.

– origin OE sārig ‘pained, distressed’, of W. Gmc origin, from the base of sore.