nudum pactum
C2CEFR level
96/100Rarity: very rare
TechnicalRegister
A bare promise unsupported by consideration and therefore unenforceable.
Without anything moving from the promisee, his assurance is a nudum pactum we cannot sue on.
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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