1. past tense and past participle of firm; made or became firm, solid, or stable

Examples

• The concrete firmed up after several hours of drying.
• She firmed her grip on the rope before climbing.
• The ground firmed beneath their feet as winter approached.
• The company’s stock price firmed after the positive earnings report.
• His resolve firmed as he faced the difficult decision.
• The butter firmed in the refrigerator overnight.