The noun 果汁 (guǒzhī) means "fruit juice." It combines 果 (fruit) and 汁 (juice/liquid). It is used in everyday contexts when referring to juice as a drink, such as 一杯果汁 (a glass of juice).
我想喝一杯橙子果汁。
Wǒ xiǎng hē yì bēi chéngzi guǒzhī.
I'd like a glass of orange juice.
冰箱里还有果汁吗?
Bīngxiāng lǐ hái yǒu guǒzhī ma?
Is there still juice in the fridge?
这家店的鲜榨果汁特别好喝。
Zhè jiā diàn de xiānzhà guǒzhī tèbié hǎohē.
The freshly squeezed juice at this shop is especially delicious.