Synonyms of open-mouthed in English:

open-mouthed

adjective

  • they stare at us open-mouthed, as if we are completely insane
    informal flabbergasted
    British informal gobsmacked
  • Definition of open-mouthed in:

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    Word of the day bimble
    Pronunciation: ˈbɪmb(ə)l
    verb
    walk or travel at a leisurely pace