allegiance
B1CEFR level
45/100Rarity: uncommon
TechnicalRegister
Law noun
The loyalty owed by a person to the state of which they are a national or subject.
The naturalisation ceremony required him to pledge his allegiance to the Crown.
Business noun
Loyalty or commitment of a customer to a particular brand or supplier.
Switching costs were low, so the vendor had to earn allegiance through service rather than lock-in.
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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