non-payment
Word family
Synonym discussion
Sense: noun/1
'Non-payment' is the broad formal term for money that should have been paid but was not. 'Default' is stronger and usually points to a legal or contractual failure, especially with loans or bonds. 'Arrears' focuses on overdue payments that have piled up over time, such as rent or wages. 'Delinquency' is common in finance and credit reporting, where it suggests a scheduled payment is seriously late. In a school letter, you might read 'non-payment of fees'; in a bank document, you are more likely to see 'loan default' or 'payment delinquency'. If several months are still owed, 'arrears' is often the best choice.
Common collocations
Etymology
This noun was formed in English by adding 'non-' to 'payment'. 'Payment' comes from the verb 'pay', which reached English through Old French from Latin roots connected with settling a debt or making peace. The modern word keeps that money sense and names the absence of the payment that should have been made.