lituus /litˈū-əs/

1. An augur's curved staff (historical)
2. A J-shaped Roman trumpet (historical)
3. A curve of similar form with the polar equation r² θ = a (mathematics)

• sharpened
• sharpener
• sharpeners
• sharpening
• sharpens
• sharper
• sharpers
• sharpest
• sharp-eyed
• sharp-ground
• sharpie
• sharpies
• sharping
• sharpings
• sharpish
• sharp-looking
• sharply
• sharpness
• sharpnesses
• sharp-nosed
• sharp-pointed
• sharp practice
• sharp practices
• sharps
• sharp-set