It would only be redundant if the context had already made it unambiguous that it was water. It is possible to be submerged under any liquid: for example french fries are cooked submerged under hot oil (they can't be cooked submerged under hot water).
Yes, "submerged underwater" is redundant. Submerged under anything is redundant since the prefix "sub-" means "under." In most cases, the use of "submerged" alone is sufficient. In case there is some question about the substance something is submerged in (not necessarily liquid, not necessarily tangible), you might occasionally have use for "submerged in water."
It is used to express someone who says very little often is very knowledgeable and has profound thoughtIt is used to express someone who says very little often, but can be very knowledgeable and have profound thought."Still waters run deep."Some rivers have rough surfaces with waves. That's usually because the water is shallow and there are rocks near the surface. But deep rivers have no rocks near the surface and the water is smooth and still. "Still waters run deep" means that people who are calm and tranquil on the outside, often have a strong, "deep" personality.still (adjective) = calm, motionlessdeep (adjective) = going far down
Still Waters - Run Deep - was created in 1996.
'Unknown' is an adjective, 'waters' is a common noun. Possibly the expression is the title of something in particular that you meant, in which case you should have capitalised it.
The noun 'water' is a common, concrete noun; a word for a thing.The noun 'water' is an uncountable (mass) noun as a word for clear, colorless, odorless, and tasteless liquid, essential for life on Earth; a word for a substance.The plural noun 'waters' is a word for an area of seawater bordering on and under the control of a country (territorial waters); water from a particular source (the waters at Baden-Baden); or used for a particular type of situation (troubled waters).The word 'water' is also a verb: water, waters, watering, watered.
The noun 'water' is a singular, uncountable noun, a word for a substance. Units of water are expressed in measures or forms such as cups of water, glasses of water, bodies of water, etc.The plural noun 'waters' is a word specifically for an area of seawater bordering on and under the control of a country (territorial waters); water from a particular source (the waters at Baden-Baden); or used for a particular type of situation (troubled waters).The word 'water' is also a verb: water, waters, watering, watered.
Buoyancy is the force exerted by the weight of water displaced by an object that is at least partially submerged in the water. Surface tension a force of attraction exerted between water molecules at the waters surface interface. Something can not become submerged in the water until this surface tension is broken. Surface tension is a very weak force and can be overcome physically or by changing the chemistry at the surface (adding a wetting agent).
The hydrosphere
*
Vertically
At the waters surface
water lilies help them adapt in water. they usually float on the surface of quiet waters, with the stalk reaching down to the bottom of the pond. some varieties, however, grow completely under water, even producing their flowers and fruits while submerged.
surface
hydrosphere
no.
ocean fronts
its true
Nutrients are in deeper (colder) waters while light is in surface waters.