labile mood
C2CEFR level
78/100Rarity: rare
TechnicalRegister
A mood that shifts rapidly and disproportionately, often with abrupt swings between tearfulness and elation.
Her mood was labile throughout the interview, moving from laughter to tears within minutes.
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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