To stanch means to:

To stanch means to check or stop, typically in the context of fluids or further harm. This term is often associated with halting bleeding by applying pressure or using a dressing, thereby preventing any further loss. The fundamental idea behind "stanch" is to restrict or control a flow, whether it be blood, progress, or some sort of detrimental situation.

The other options do not capture this meaning. "Impulse" relates to a sudden desire or urge, "enhance" means to improve or augment something, and "solicit" refers to asking for something, often used in the context of requests or entreaties. None of these alternatives conveys the core action of stopping or checking a process, which is the essence of what it means to stanch.