The phrasal verb "rest up" is predominantly used in informal speech, though it can occasionally appear in more casual formal contexts, especially in writing meant for a broad audience or in direct advice given in a friendly tone. It is primarily employed when urging someone to take time to recover from fatigue, illness, or exertion, implying a proactive approach to achieving full rest and recovery. "Rest up" might frequently be used in contexts such as healthcare, among family and friends, or in sports, where recuperation is crucial. For instance, a coach might tell an athlete to "rest up" before a big competition or a friend may advise someone who is feeling under the weather to "rest up" to regain their strength. This phrasal verb carries a sense of care or concern for the person's well-being, emphasizing the importance of sufficient rest for optimal functioning.
B1
PreIntermediate
1. To recover from fatigue or exhaustion by taking a break.
After the long hike, she decided to rest up for the afternoon.
You're looking tired; you should rest up before the meeting tomorrow.
2. To spend time relaxing in order to regain one's strength.
The coach told the players to rest up before the big game.
After working the night shift, he needs to rest up to feel fresh again.