stiffness
A2CEFR level
25/100Rarity: fairly common
TechnicalRegister
Difficulty and reduced ease in moving a joint or muscle.
The patient complained of early-morning stiffness lasting over an hour.
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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