dead·lock 
(dĕdlŏk′)
(dĕdlŏk′)n.
1. A standstill resulting from the opposition of two unrelenting forces or factions.
2. Sports A tied score.
3. Computers A failure or inability to proceed due to two programs or devices both requiring a response from the other before completing an operation.
4. Chiefly British A deadbolt.
tr. & intr.v. dead·locked, dead·lock·ing, dead·locks
To bring or come to a deadlock.