Lost strength can be described as a decrease in physical or mental power. The term can be broken down into two crossword solutions: WANED (5 letters) and WOREOFF (7 letters). WANED is defined as to have gradually become weaker or less intense, while WOREOFF is defined as to have been used up or diminished. Together, these two words describe the concept of lost strength, which is a decrease in physical or mental power.