retrofit
B2CEFR level
35/100Rarity: fairly common
TechnicalRegister
To add new components or features to an existing product or facility after manufacture.
The fleet was retrofitted with telematics so dispatch could track every truck live.
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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