This article is devoted to the study of the features of the linguistic and cultural concept “water” in the German and Armenian languages. The examples have been chosen from idiomatic dictionaries and electronic sites. The usage of the concept in the idioms is related to the lingual thinking, psychological and cultural peculiarities of the native speakers, and the study allows to complete the very important linguo-cultural reflection of the concept “water” in the idiomatic level of the two languages.