Vocabulary For Endurance

adjective extremely tiring and demanding; exhausting

• The grueling process of obtaining a PhD requires years of dedicated research and writing.
• The hike up the mountain was so grueling, I thought I wouldn't make it to the top.
• The workout session was absolutely grueling, but I feel so accomplished now.
• Dealing with her constant criticism was a grueling experience that took a toll on my mental health.

adjective describing something that is constant, persistent, or unceasing

• The patient's unremitting pain required constant monitoring by medical staff.
• I can't handle the unremitting noise coming from the construction site next door.
• The unremitting heat in this city is killing me.
• Her unremitting determination to succeed is truly inspiring.