hazardous (adjective) hazardous: dangerous, unpredictable
Sinonime: Neptunian, abyssal,
aquatic, coastal, deep-sea, hydrographic, littoral, maritime, natatorial, nautical, naval, navigational, oceangoing, oceanic, oceanographic, of the sea, pelagic, saltwater,
sea, seafaring, seagoing, seashore, seaside, shore
Antonime: certain,
guarded,
predictable,
protected,
safe,
secure