Dilute

разбавленный

razbavlennyj

(having a low concentration)

разведённый

razvedjónnyj

(having a low concentration)

разба́вить

razbávitʹ

(to add more of a solvent to a solution; especially to add more water)

разбавля́ть

razbavljátʹ

(to add more of a solvent to a solution; especially to add more water)

размыва́ть

razmyvátʹ

(stock market: to decrease the value of individual shares by increasing the total number of shares)