Hit the wall means to reach the limit of your strength. It describes the moment when, after a long effort, your energy suddenly runs out and you can't go on: in a marathon, at the end of a hard week, late at night before an exam.
When would you say hit the wall?
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hit the wall (at + point/time); hit a wall (with + project)
- I hit the wall at kilometre thirty and had to walk the rest of the race.
- By Thursday afternoon I'd hit the wall and couldn't read another email.
- We hit a wall with the app when our main developer left the company.
What changed
First versionAfter six hours of revision I hit into the wall and went to bed.
RevisionAfter six hours of revision I hit the wall and went to bed.
No preposition is needed after hit: hit the wall, not hit into the wall. Into may appear if you picture crashing into a real wall, but in the idiom the wall is figurative and the form never changes.
With a (hit a wall), people more often mean a project that has got stuck: Our research hit a wall when the funding stopped. In an essay, use run out of energy for tiredness and stall for a project that has stopped moving.
Your turn
I felt fine for the first two hours of the hike, but then I suddenly ___ and needed a long rest.
Show the answer
hit the wall — The hiker ran out of energy and needed a long rest, so hit the wall is right. Hit the road means “set off on a journey”, and it doesn't explain why the hike had to stop after two hours.
Think of a day when your energy ran out before your work or studying was done. Say when it happened and what you did next.
During exam week I hit the wall around midnight on Tuesday, so I closed my notes and went for a short walk.
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