barley water
US /ˈbɑːrli ˌwɔːtər/
UK /ˈbɑːrli ˌwɔːtər/
1.
a drink made from barley, often flavored with lemon, and sometimes used as a mild diuretic or for soothing a sore throat
:
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She prepared a glass of warm barley water for her sick child.
•
I find barley water refreshing on a hot day.