To be unguarded is to be exposed, vulnerable or defenceless. Some synonyms for the word unguarded include careless, heedless, thoughtless, imprudent, incautious, reckless and unthinking. Being unguarded is often seen as a negative trait, particularly in situations where someone is entrusted with a great deal of responsibility. It can lead to errors, misjudgements and failures. However, it can also be a positive attribute if it is seen as being willing to take risks and being open to new experiences. Ultimately, whether being unguarded is seen as a positive or negative quality will depend on the context in which it is displayed.