Synonyms of 'no go'
▷ See go
impossibleDictionary, not on (informal), vainI tried to get him to change his mind, but it was no go.
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If you say that something is futile, you mean there is no point in doing it, usually because it has no chance of succeeding.
a futile attempt to ward off the blow
Someone or something thing that is hopeless is certain to fail or be unsuccessful.
I don't believe your situation is as hopeless as you think.
A vain attempt or action is one that fails to achieve what was intended.
They worked all night in a vain attempt to finish on schedule.
Thesaurus for no go from the Collins English Thesaurus
impossible ; abortive or futile