/ feɪz; NAmE / verb
[ vn ] [ often passive ] ( informal ) to make you feel confused or shocked, so that you do not know what to do
SYN disconcert :
She wasn't fazed by his comments.
He looked as if nothing could faze him.
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WORD ORIGIN
mid 19th cent. (originally US): variant of dialect feeze drive or frighten off , from Old English fēsian , of unknown origin.