| Idiom | Meaning | Example | 
| at loggerheads | 
not agreeing, opposed to each other
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They're at loggerheads over who owns the farm. They don't agree.
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| at loose ends | 
disorganized, unable to concentrate
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I was at loose ends when the kids were fighting. I couldn't think.
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| at my wits' end | 
very tired and nervous, at the end of my rope
 | 
After a wedding and a funeral she was at her wits' end.
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| at odds | 
not in agreement, opposed, at loggerheads
 | 
Your testimony in court is at odds with the statement you gave to the police. Why are they different?
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| at one fell swoop | 
(See in one fell swoop)
 | 
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| at once | 
at the same time, simultaneously
 | 
You can't do two things at once. You can eat or talk, but not both.
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| at once | 
now, immediately
 | 
Your mother said you should come in at once - immediately.
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| at one time | 
in the past, during a time past, once upon a time
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At one time, the sun didn't seem so hot. We didn't need sunscreen when we worked or played in the sun.
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| at peace | 
feeling peaceful, without worry
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After talking about his problem he was at peace with himself.
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| at rest | 
stopped, not moving
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Tie these ropes while the boat is at rest - before it moves.
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