placebo
B1CEFR level
35/100Rarity: fairly common
TechnicalRegister
An inert treatment given as if it were an active drug.
Half the trial group received a placebo.
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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