See also: тоню Russian Etymology 1 Pronunciation IPA(key): [tɐˈnu] Verb тону́ • (tonú) first-person singular present indicative imperfective of тону́ть (tonútʹ) Etymology 2 Pronunciation IPA(key): [ˈtonʊ] Noun то́ну • (tónu) m inan dative singular of тон (ton)Wikiwand - on Seamless Wikipedia browsing. On steroids.