Here are some examples of situations where someone might be "too delighted for words":
* Winning the lottery: Imagine winning a huge amount of money. The sheer joy and disbelief might make you speechless.
* A surprise proposal: Being proposed to by the love of your life can leave you completely overwhelmed with happiness.
* Reuniting with a loved one after a long separation: The joy of seeing a family member or friend you haven't seen in years could be overwhelming.
In essence, "too delighted for words" is a way of saying that someone is experiencing a level of joy that surpasses the ability to express it through language.