labile
C2CEFR level
75/100Rarity: rare
TechnicalRegister
Describing mood or emotion that shifts rapidly and easily from one state to another.
His mood was markedly labile, moving from tearfulness to laughter within a single conversation.
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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