Excuse is a reason stuffed with a lie. Never commit yourself to excuses. The more you give excuses, your environment or the world around you loses confidence in you, hence absence of trust would he or she has for you. Where you are faulty, confess it and be forgiven, never give an excuse. For something you couldnt do, confess it, never lie by giving an excuse. Let the environment know your real self and they would have confidence in you as a friend, child, partner or any other relation. Hey! no excuses!!!