Please enable javascript to use dictionary! Howto enable javascript?
by heart▼(knowing completely)preposition[UK: baɪ hɑːt] [US: baɪ ˈhɑːrt]
inside out▼(of knowledge: thoroughly)adverb[UK: ˈɪn.ˈsaɪ.daʊt] [US: ˈɪn.ˈsaɪ.daʊt]
know inside and out▼(know (something) very thoroughly)verb
↑