English term to describe "kompot", an Eastern European beverage made from berries
UK English would call it a cordial. Though typically strained as below:

Place 300g mixed fresh or frozen berries, 1½ cups white sugar and ¼ cup lemon juice in a heatproof bowl. Add 1 cup boiling water. Stir until sugar has dissolved. Strain cordial through a sieve, pressing down with the back of a spoon, into a large heatproof jug.
Mixed Berry Cordial Recipe | Woolworths
https://www.woolworths.com.au/shop/recipedetail/4123/mixed-berry-cordial