side letter
C2CEFR level
85/100Rarity: very rare
TechnicalRegister
A separate document varying or supplementing the main contract between the same parties.
A confidential side letter granted the tenant a rent-free period not mentioned in the lease itself.
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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