Cocksure (adjective)

Having or showing a confident and arrogant attitude.

Origin:

The word "cocksure" is a combination of "cock" meaning "a young rooster" and "sure" meaning "confident". it appeared in the 19th century.

Examples:

1. He was so cocksure of his own abilities that he never doubted his decision.
2. She was cocksure of her victory in the election.
3. He was cocksure that he could fix the problem himself.
4. She was cocksure of her own beauty and charm.
5. He was cocksure that he was right and refused to listen to any other opinions.