be the horizon (verb) threaten: endanger
Sinonime: altercation, breach,
break, break-up, bustup,
clash,
contention, detachment,
disruption, disunion, division, divorce, divorcement, estrangement, falling-out,
feud, hostility,
misunderstanding, parting, partition,
quarrel,
rift, schism, separation, split, split-up
Antonime: agreement,
harmony,
peace