Radical 氵
12 strokes
water 氵 (78a) + a drink 曷 (575b) = thirsty 渴
[口渴 (5) kǒukě thirsty]

Watering down the drinks in the pub only works if the customers are thirsty (because then they won’t notice). / Teddy does this behind a curtain (taking a sip from each glass and topping it up with water).