Origin: Latin suffix -ary
Estuary has 3 different meanings across 2 categories:
the wide part of a river where it nears the sea; fresh and salt water mix
"The fishermen knew best how to find the deepest channels in the muddy estuary where the river meets the ocean."
A coastal water body where ocean tides and river water merge, resulting in a brackish water zone.
"The migrating birds gathered in large numbers at the estuary, feeding on the abundant fish found where the salty tide meets the fresh river flow."
Estuary English
"His accent had that smooth, rhythmic quality often associated with Estuary English as he spoke on the radio show."