His diet was restricted to 'liquids'. = He was on a 'liquid diet'.
They offered us snacks and 'liquid refreshments'. [='drinks']
the 'liquid' grace of the dancer's movements
(..) I remember stroking the cat, it was so soft. Siamese with blue eye and a broken tail. I remember the days of your milk in my mouth, the room, the liquid... I just wanna tell you that I love you, mom and dad... And I wanna thank you for the... thousand kisses that I can still feel on my face... (..)2014 Lucy