yellow-dog contract
C2CEFR level
92/100Rarity: very rare
TechnicalRegister
A now-unlawful agreement conditioning employment on the worker's promise never to join a union.
That clause barring him from ever joining a union is a textbook yellow-dog contract and utterly unenforceable today.
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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