Synonyms of impasse
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• We have reached a dead end.
• Larkham broke the deadlock with a late goal.
stalemateStalemate is a situation in which neither side in an argument or contest can win or in which no progress is possible.
• He said the war had reached a stalemate.
Thesaurus for impasse from the Collins English Thesaurus
a situation in which progress is blocked; an insurmountable difficulty; stalemate; deadlock