이자

When we talk about money, the word 이자 (interest) is a super important concept to understand. Think of it as the price you pay for the privilege of using someone else's money.

If you take out a loan from a bank, you have to pay back the original amount plus some extra money—that extra bit is the interest. Conversely, when you put your money into a savings account, the bank pays you interest for keeping your money with them. It is essentially the 'rent' paid for money.

The Korean word 이자 (利子) comes from Sino-Korean roots. The character 利 means 'profit' or 'benefit,' and 子 means 'child' or 'offspring.'

Historically, this metaphor suggests that the interest is the 'offspring' or the 'fruit' produced by the original money (the parent). It is a fascinating way to view wealth, implying that money can 'reproduce' or grow over time if managed correctly.

You will hear 이자 used most often in banking and personal finance contexts. Common collocations include 'paying interest' (이자를 내다) or 'receiving interest' (이자를 받다).

The register is usually neutral to formal. Whether you are talking about a mortgage, a credit card, or a high-yield savings account, this word is the standard term used by everyone from teenagers to professional bankers.

1. 이자율 (Interest rate): The percentage rate at which interest is calculated.

2. 복리 (Compound interest): Interest calculated on the initial principal and also on the accumulated interest of previous periods.

3. 단리 (Simple interest): Interest calculated only on the principal amount.

4. 고금리 (High interest rate): A situation where the cost of borrowing is very expensive.

5. 저금리 (Low interest rate): A situation where borrowing is cheap, often used to stimulate the economy.

이자 is a non-count noun in many contexts, but can be used with counters when discussing specific payments. In Korean, it functions as a standard noun.

The pronunciation is straightforward: 'ee-jah.' The stress is usually even, though in natural speech, the first syllable may carry slightly more weight. It rhymes with words like 'pizza' (in some accents) or 'faja.'