What is the origin of the idiom "lost for words" and when to use it?

The idiom "lost for words" originated from the idea that when someone is truly surprised, shocked, or overwhelmed by an event or situation, they may be unable to find the right words to express their thoughts or feelings. It is used to describe a moment of speechlessness. In various contexts, it can denote a lack of vocabulary to describe something or even indicate a moment of profound emotional impact.