Frog (noun)

1. A cold-blooded amphibian typically characterized by smooth, moist skin, webbed feet, and long hind legs adapted for leaping.
2. A device used for hoisting heavy loads, consisting of a platform attached to a beam and a winch.
3. A small, squat, ugly, or contemptible person.

Origin:

From old english frogga, from proto-germanic *frawjaz (compare west frisian frog, dutch kikker, german frosch), from proto-indo-european *preu- (compare lithuanian perkỹtis, russian пава́й (paváj), serbo-croatian pȍvjedak).

Examples:

1. The pond was full of frogs.
2. The frog hopped across the lily pad.
3. He used a frog to hoist the engine out of the car.
4. He was called a frog because of his appearance.
5. The kids called him a frog because of his croaky voice.