noun
interest-free; no interest
Used in financial and policy contexts to describe loans, bonds, or accounts that earn or charge no interest.
政府は無利子の融資制度を拡充した。
The government expanded the interest-free loan program.
この口座は無利子です。
This account earns no interest.
有利子 is the opposite, meaning 'interest-bearing' or 'with interest'.
Compound of 無 (mu, 'without') + 利子 (rishi, 'interest'). The reading むりし follows standard on'yomi.