Imp (noun)

1. A small or mischievous devil or sprite.
2. A small, mischievous child.
3. A small or insignificant person or thing.
4. A small or young animal, especially a young domestic animal.

Origin:

Old english impa, from latin impius ungodly, from in- + pius pious.

Examples:

1. The story tells of a group of imps who caused trouble in the village.
2. He was called an imp by the adults, because of his mischievous behavior.
3. The company"s new product is an imp in the market, it"s not making a big impact.
4. The baby lamb was an imp, it was too small to survive on its own.
5. The small squirrel was an imp, it was too young to survive without its mother.