nil by mouth
B2CEFR level
68/100Rarity: rare
TechnicalRegister
An instruction that a patient must not eat or drink, typically before surgery or a procedure.
Please keep her nil by mouth from midnight ahead of tomorrow's endoscopy.
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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