Dagger (noun)

1. A short pointed knife used as a weapon.
2. A character † used to indicate a note or comment, especially one added as an afterthought.

Origin:

Middle english: from old french dague, from provençal daga, of unknown origin.

Examples:

1. He had a dagger hidden in his sleeve.
2. She threatened him with a dagger.
3. The dagger had a jewel-encrusted hilt.
4. The dagger was used for ceremonial purposes.
5. The dagger was the symbol of the secret society.