Yes, if you borrow ETH in JustLend, you will need to repay it. JustLend is a decentralized lending platform that allows users to borrow and lend TRC20 ETH tokens. The platform uses a smart contract system that requires borrowers to return the borrowed ETH tokens with interest when the loan is due. Borrowers must also pay a one-time origination fee when taking out a loan. Failure to repay the loan will result in the borrower's ETH tokens being liquidated and the lender receiving the repayment plus interest. So, if you borrow ETH in JustLend, you will need to repay it in order to avoid any penalties.