Some pine extracts

• Prepares a bow, with "up"
• Varnish ingredients
• Violinists' applications
• Treats, as a bow
• Maintains, as a violin
• Prepares to bow
• Substances for Strads
• Ingredients in bowstring waxes
• Prepares, as a violin bow

Wiktionary Word definitions in Wiktionary
n. (plural of rosin English) vb. (en-third-person singular of: rosin )