This is the 834th most frequent Korean word.
주식
"주식" means "stock" or "share" in English.
Here, '주식' refers to 'stocks' or 'shares', used as a financial term.
저는 주식 투자를 시작했습니다.
I have started investing in stocks.
Here, '주식' means the 'main staple' of a meal, referring to the primary food component like rice in a Korean context.
저녁 식사는 주식 외에도 다양한 반찬이 포함됩니다.
Dinner includes not just the staple food, but also various side dishes.
In this sentence, '주식' pertains to 'stock' as in stockholding of companies, part of the term '주식회사' meaning 'joint-stock company'.