1. to come to help or support; to arrive as assistance
Usage: formal; literary
2. to happen or occur, especially unexpectedly
Usage: formal; archaic

Examples

• The charity organization subvened to help the flood victims.
• When the crisis deepened, international aid subvened to provide relief.
• A sudden opportunity subvened that changed everything.
• The foundation subvened with emergency funding for the project.
• Help subvened from an unexpected source during their darkest hour.