不払い|ふばらいfubarai[2]nakadaka (mid-high)

1. nounnonpayment; default

• Synonym滞納たいのうNeutralNot paying what is owed by the deadline, as in 「家賃の滞納」; the focus is on being behind on rent, taxes and similar dues once they fall overdue.
• Synonym不払NeutralThe same word written without okurigana; identical in meaning to 「不払い」 and found mostly in official documents and headlines.
• Related未払いみはらいNeutralRefers to money not yet paid, as in 「未払い賃金」; it stresses that payment simply hasn't been made, while 「不払い」 stresses not paying what is due.
• Related未納みのうNeutralFailing to pay in what is due, as in 「年金の未納」; used mainly for taxes, insurance premiums and similar dues.
• RelatedデフォルトNeutralLoanword meaning default on a debt; it also refers to a computer's default setting. Skews toward financial contexts.
• Related不納ふのうWrittenFailure to pay taxes or other money owed; a written, formal term rarely heard in speech.
• Antonym支払いしはらいNeutralAntonym: making a payment. The ordinary word for paying, the direct opposite of 「不払い」.
• Antonym払いはらいNeutralAntonym: payment, as in a bill or account; stands opposite to 「不払い」.
• Antonym返済へんさいNeutralAntonym: repaying money or a loan you owe; the opposite of refusing to pay a debt.

Use 「不払い」 for money not paid when due, as in 「給料不払い」 or 「代金の不払い」. For money simply not yet paid, say 「未払い」; for falling behind on taxes or rent, 「滞納」 or 「未納」. The antonym is 「支払い」.

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

1. お金かねを支払しはらうべき時期じきに支払しはらわないこと。