expression
(not) at all; (not) by any means; (cannot) possibly
Emphatic expression used with a negative sentence to mean 'absolutely not' or 'there's no way'. Often followed by できない, 無理, or similar negative predicates.
See also: とても
とてもじゃないが、こんなにたくさんの仕事は一日では終わらせられない。
There's no way I can finish this much work in one day.
とてもじゃないが、彼の提案には賛成できない。
I absolutely cannot agree with his proposal.