cash cow
B2CEFR level
45/100Rarity: uncommon
TechnicalRegister
A mature business or product that generates steady profit with little further investment.
The legacy hardware line remained a cash cow that funded the company's riskier growth bets.
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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