變堅固；變堅實；最後落實；敲定
變堅固；變堅實
to become harder or more solid
Put the mixture somewhere cool to firm up.把混合物放在一個地方冷卻變硬。
firm sth up
最後落實；敲定
to make arrangements more final and fixed
The company has not yet firmed up its plans for expansion.公司的擴大計劃尚未最後落實。
使堅固；使堅硬；使堅實
to make sth harder or more solid
A few weeks of aerobics will firm up that flabby stomach.幾個星期的有氧健身運動將使鬆弛的腹部結實。
釋義來自《牛津高階英漢雙解詞典》第 9 版
