deadlock UK US /ˈdedlɒk/ noun [C or U]
a situation in which people cannot agree and no progress can be made: a deadlock between sb (and sb) »

There was deadlock between the directors and the negotiating committee.

a deadlock in sth »

The deadlock in the talks meant that the dispute was taken to arbitration.

a deadlock on/over sth »

There was a legislative deadlock over how to reduce property taxes.

end in/reach deadlock »

Nurses went on strike after pay talks ended in deadlock.

break/end a deadlock »

Bosses have been in intense negotiations with employees to break a deadlock over the proposed pay cuts.

Financial and business terms. 2012.