Tad (noun)

1. A small amount or degree.
2. A small child or young person.

Origin:

Early 18th century (in the sense "small amount"): probably from tadpole.

Examples:

1. She added a tad more salt to the soup.
2. He is still a tad too young to understand it.
3. The price increased by a tad.
4. He is just a tadpole, he will grow up.