The crossword solution for the term GROW TIRED is FLAG, which is a four-letter word. FLAG is a noun that refers to a piece of fabric with a distinctive design, used as a symbol, standard, signal, or emblem. Flags are often used to represent a nation, state, or organization, and they can also be used to show support or as a visual signal. Flags are also used in sports, such as football, to indicate when a penalty has been called.