to crack a skull
- idiom
- NSFW
- If you don't wear a helmet while riding, you might crack a skull in an accident.
Examples
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He fell off his bike and cracked a skull on the pavement.
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I've been fighting for as long as I can remember, and I'll crack a skull or two if I have to.
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The boxer accidentally cracked a skull during the intense match.
Synonyms
To change a large bill into smaller bills
To break a hard object, for example a bone or rock
Antonyms
How Severe
Surface Forms
Morphology
The meaning 'to suffer a severe head injury' is directly and literally derivable from combining 'crack' (to break) with 'skull' (the bony case of the head); a B1 learner who knows both words would readily infer a skull being broken. This is a straightforward, non-idiomatic physical composition found across languages, so it is transparent rather than metaphorical or unpredictable.
Etymology
Crack a skull comes from a simple, literal image: hitting the hard bone of the head so it makes a loud crack, like breaking a nut. Because to crack a skull is to break that hard shell, the phrase now means 'to suffer a severe head injury'.