未納|みのうminou[0]heiban (flat)

1. nounpayment default; overdue on a payment

• Synonym未払いみはらいNeutralFor goods or services not yet paid for; centers on payment itself, while 「未納」 is about taxes, dues and the like that should have been handed in.
• Synonym滞納たいのうNeutralPayment still not made after the deadline; stresses being overdue, as in 「税金の滞納」.
• Related不払いふばらいNeutralRefusing or failing to pay, with a shade of deliberate nonpayment; stronger than 「未納」.
• Related不履行ふりこうNeutralFailure to carry out an obligation or contract; broader than 「未納」 and not limited to payments.
• RelatedデフォルトNeutralA loanword for defaulting on a debt; also means a default setting — a term of finance and IT.
• Related不納ふのうWrittenNot paying taxes and the like; rare and found in written/formal prose, close to 「未納」.
• Antonym完納かんのうNeutralPaying everything in full — the opposite of 「未納」, which is not yet paid.
• Antonym全納ぜんのうNeutralPaying the full amount; stands opposite 「未納」, which means not yet paid.

Use 「未納」 for taxes, pension or dues that should have been paid but have not. For overdue arrears pick 「滞納」, for unpaid bills 「未払い」; the opposite of 「未納」 is 「完納」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. 納おさめるべきものをまだ納おさめていないこと。