The crossword solution for the term 'SHOWING TIREDNESS' is YAWNING, which is a seven letter word. YAWNING is an involuntary reflex action that is often associated with tiredness, boredom, or stress. It is characterized by an open mouth, deep inhalation of air, and a long exhalation of breath. YAWNING is a common behavior in humans and many other animals, and it is thought to be a way of communicating fatigue or boredom.