利子|りしrishi[1]atamadaka (head-high)

1. nouninterest (on a deposit, loan, etc.)
   この貸付金かしつけきんは高たかい利子りしをとられることになっている。↗

   This loan will carry very heavy interest.

• Synonym利息りそくNeutralA noun meaning interest, synonymous with 「利子」 but leaning written, typical of legal and contractual contexts.
• Related金利きんりNeutralA noun for the interest rate or interest (「金利が上がる」); common in finance and economic news, while 「利子」 stresses the money actually paid.
• Antonym元金がんきんNeutralThe principal; the counterpart of 「利子」.
• Antonym元本がんぽんFormalA formal term for the principal, often in investment contexts; the counterpart of 「利子」.

Use 「利子」 for interest on loans or deposits (「利子が付く」「無利子」); for interest rates say 「金利」, and in legal or contractual contexts 「利息」. The opposites are 「元金」 and 「元本」.

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

1. 金銭きんせん貸借たいしゃくにおいて、元金がんきんの返済へんさいに加くわえて、借り手かりてから貸し手かしてに支払しはらわれる金銭きんせん。