showstopper
B2CEFR level
50/100Rarity: uncommon
TechnicalRegister
A defect or problem so severe that it prevents release or continuation until resolved.
We found a showstopper in the payment flow the night before launch and had to pull the release.
Rarity runs from 0 (a word everyone knows) to 100 (almost never seen outside specialist or literary writing). Level is the word's real difficulty on the CEFR scale, from A1 to C2.
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