tiredness
n. B1 Intermediate US //ˈtaɪɝdnɪs// UK //tˈaɪədnəs// tired·ness
n. the feeling of being physically or mentally worn out. You feel this when you have worked hard or stayed up too late.
n. a state of physical or mental exhaustion resulting from prolonged activity or lack of rest.
The long drive made me feel a lot of tiredness.
After working two extra shifts this week, she felt a deep sense of tiredness that wouldn't go away.
The athlete's performance began to suffer as the tiredness from the previous season's rigorous training schedule finally caught up with him.
From Middle English tiredness, terednesse, equivalent to tired + -ness.