Definition of flabbergast in English:

flabbergast

Line breaks: flab¦ber|gast
Pronunciation: /ˈflabəgɑːst
 
/

verb

[with object] (usually as adjective flabbergasted) • informal

Origin

late 18th century: of unknown origin.

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Word of the day maelstrom
Pronunciation: ˈmeɪlstrəm
noun
a powerful whirlpool in the sea