Hydrant (noun) hydr Def- an upright pipe with a spout, nozzle, or other outlet, usually in the street, for drawing water from a main pipe, especially for fighting fires S- You are not allowed to park in front of a hydrant because in case of emergency fire fighters can get to it easily.
Aquarium (noun) aqua Def- a glass tank or bowl in which fish or other aquatic animals live. S- If you ever go to Sea World, you will see many aquariums with all different types of animals.
Aqueduct (noun) aqu Def- A channel that has been built to carry water over long distances. S- An aqueduct looks very much like a bridge but can carry water over it.
Marine (noun) mar Def- related to the sea; existing in or produced by the sea. S- In a marine there are usually a lot of beautiful coral and lovely marine animals.