deadlock
/ˈdedlɒk ˈडे̮ड्लॉक्/ noun [sing., U] a situation in which two sides cannot reach an agreement ऐसी स्थिति जिसमें दोनों पक्ष समझौते पर न पहुँच सकें; गतिरोध
Talks have reached (a) deadlock.
to try to break the deadlock