Cách sử dụng
The word 'firm' can be used to describe something that is strong, unyielding or solid, like a firm handshake. It can also refer to a company or business that is well-established, has a good reputation, and is dependable. When you say you have a firm opinion, it means you are quite certain about your thoughts and beliefs. In the context of exercise, when someone refers to their "firming up" regime, that means they are working on strengthening and toning their muscles.